beta member become alpha / skip head

The Game isnt Realesed only the beta but These are only dir alpha skip ahead member

You must be invited to become an Alpha Insider or Alpha Skip Ahead Insider, to do so You must Very active in Xbox, doing missions and report the bugs You see in the system, as much as You do this, so You Will be Very close to become an Alpha Insider. You
must be at least in Delta preview to become an Alpha Insider, but You Just need to be an Insider to be invited to become an Alpha Skip Ahead, but this one is very rare to be invited and there is a certain number of people to be invited, no more than that,
If You were not invited to be Alpha Skip Ahead certain time, so You must wait a Second chance when they Will invite New members.

Only Xbox Insider Hub members ( Alpha Skip Ahead - Alpha - Beta ) ring, can subscribe to the XGPU. I believe it will be open for everyone to subscribe later this year.

The Chromium browser was previously only available for members in the Alpha Skip-Ahead ring, but as of the last couple of days, it's not only been rolled out to Alpha members, but also Beta and Delta members. Only the Omega rings have yet to receive it.

Status July 2021

I believe you can re-enroll but I don't believe is guaranteed to be in Alpha still.

If I deregister the Xbox X out of the program, will it also deregister the Xbox One?

Originally the Xbox One was in Skip-A-Head Alpha. I purchased the Xbox One X, selected registration for Alpha Skip-A-Head, and it was automatically enrolled in the Alpha Skip-A-Head program.

I got the impression it is tied to the user who not the product. Hopefully someone in the program knows for sure.