PUP update availability for XBOX gamers?

I am a game pass gamer and I can’t reach PUP update. I think it is interesting because i appear as an insider but i can’t play preview release. I think gamers from XBOX should reach the PUP updates.

The MS Store platform can barely, just barely roll out regular game updates. I think it has no proper system to run an often-changing public update preview channel, so this simply isn’t possible at the moment.