Unless someone sees an issue with your MPV then that might be your last resort. Did you ever try the MPV on recirculate? Can you put it on waste or backwash and pull a prime?
I tried bypassing filter, recirc…..waste and backwash but nothing different. I’ll pull pump apart tomorrow morning and see. Maybe something is stuck in there. Thank you all for these suggestions. I’m just praying it’s not an underground problem
 
Take the union apart just before the skimmer line goes into the pump. With it open, run hose water into it. You should get a good flow out of the other end. You may want to try it in reverse, since it you'd be pushing water through an open pipe, uphill, and instead go from the open pump end of the pipe to the skimmer end. If good here, likely your pipes are fine. Put it back together.

Undo the union on the vertical pipe that comes out of the pump. Run the pump and see if it will prime and pump normally. Yes, you will get a geyser with lots of water all over everything. But you should get a really strong flow out of the pipe, and the pump basket have no or little air after it primes. If not the same or stronger as you are used to seeing from your waste pipe in years past, then likely it is time to take the pump apart, and look for debris in the impellor. They can be pretty narrow, with narrow slots in them that debris plugs up and blocks. Report back if so, and we can help with a "how to". We will need the specific make/model - which is probably on the barcode sticker on the side toward the filter.

If flow is strong, put the pipe back together, and put the Filter handle to waste. Same test - looking for reduce flow from the waste. If so, take the multiport (the six screws) apart. It may be a bit of effort to pull/twist the whole top off using the handle. NO TOOLS! Check again for debris. Put pool lube on the inside spider gasket, and the o-ring around the perimeter of the top, and reassemble.

If the above strong, redo the test again, this time with one of the unions near where it goes back into the ground open. Test with the Multihandle to "Recirc", and see how it comes out of the open pipe. Then stop it, put the handle in the "Filter" position and see again. If bad on Recirc, then it is a matter of taking apart the pipes from the filter to the section inground, and seeing if there is blockage in any section. While a bit of a pain, you have lots of unions, so the job will not be difficult. If only bad when on Filter - then it is time to take apart and check the Sand filter. Report back, and we can help with that task.

A bit odd to see only one pipe out of the ground into the pump, and one return going back into the ground. How many skimmers and deep end drains are there? How many return jets into the pool? Is there anywhere else not yet pictured where there are valves to control flow, if there are either multiple suction inlets, or multiple jets?
 
Take the union apart just before the skimmer line goes into the pump. With it open, run hose water into it. You should get a good flow out of the other end. You may want to try it in reverse, since it you'd be pushing water through an open pipe, uphill, and instead go from the open pump end of the pipe to the skimmer end. If good here, likely your pipes are fine. Put it back together.

Undo the union on the vertical pipe that comes out of the pump. Run the pump and see if it will prime and pump normally. Yes, you will get a geyser with lots of water all over everything. But you should get a really strong flow out of the pipe, and the pump basket have no or little air after it primes. If not the same or stronger as you are used to seeing from your waste pipe in years past, then likely it is time to take the pump apart, and look for debris in the impellor. They can be pretty narrow, with narrow slots in them that debris plugs up and blocks. Report back if so, and we can help with a "how to". We will need the specific make/model - which is probably on the barcode sticker on the side toward the filter.

If flow is strong, put the pipe back together, and put the Filter handle to waste. Same test - looking for reduce flow from the waste. If so, take the multiport (the six screws) apart. It may be a bit of effort to pull/twist the whole top off using the handle. NO TOOLS! Check again for debris. Put pool lube on the inside spider gasket, and the o-ring around the perimeter of the top, and reassemble.

If the above strong, redo the test again, this time with one of the unions near where it goes back into the ground open. Test with the Multihandle to "Recirc", and see how it comes out of the open pipe. Then stop it, put the handle in the "Filter" position and see again. If bad on Recirc, then it is a matter of taking apart the pipes from the filter to the section inground, and seeing if there is blockage in any section. While a bit of a pain, you have lots of unions, so the job will not be difficult. If only bad when on Filter - then it is time to take apart and check the Sand filter. Report back, and we can help with that task.

A bit odd to see only one pipe out of the ground into the pump, and one return going back into the ground. How many skimmers and deep end drains are there? How many return jets into the pool? Is there anywhere else not yet pictured where there are valves to control flow, if there are either multiple suction inlets, or multiple jets?
Thanks for reply……..I will do everything you mentioned this morning. I only have one skimmer. Four returns in pool, I had to abandon the main drain years ago and capped it off because of underground damage to pipe. The pool was leaking and when I plugged the main drain in pool the leaking stopped.

I also disconnect the heat pump because the fiberglass pool was getting metal stains, once I took heater out, no more stains. I assume it was copper pipes in heat pump.
 
Hmmm - some main drains in older pools connected up inside the skimmer. I have no real knowledge of that, or how it actually works. Others will have to chime in to share about that. May be possible there is a big air leak in that area - but I am only wildly guessing.

Odd that you have four returns branching off of one exit from the equipment, with no way to control/isolate them from each other.