Hey there and welcome to the Samsung UK and EU Community Customer to Customer Forum
Beta was closed to new entrants in December.
Beta is test software and unfortunately a number of users signed up not because they wanted to test and feedback on the software but more because they just wanted One UI7.
As a result some genuine users who wanted to test and feedback were unable to join.....
I am not employed by Samsung nor do I receive any remuneration as a Samsung Members Star.
My device is an S25 Ultra.