Depends on how much you weigh, terrain, speed, technique, rims, tires, and personal preference. Parameters/compromises with different air pressure come down to traction deflection, squirm, burping, small bump compliance, rim protection, rolling speed, and don't and likely front-rear balance. Note: higher pressure does not necessarily result in more speed.
Try different pressures and see what happens.
Fwiw, I ride a decoy mx, weigh 180#, exo+ assagai / dhrii Cushcore tubeless. I run 26/22 riding northeast USA slippery and rocky trails. I run 27 1/2 / 23 1/2 in the bike park to avoid squirm on jumps and high speed berms/g-outs.
I'm no pro though. A pro friend of mine runs higher pressures with a procore in the rear only. He runs higher pressures than me for moto Enduro too though as he pushes much harder in turns riding alpine and desert whereas I prefer slower technical hard Enduro style riding.
This is just my opinion and not based on any science whatsoever.
Sometimes you just gotta experiment. Try 18/20 insert tubeless then try 26/22 and bracket.