The Asus ZenFone 6 beta tester recruitment programme, as mentioned on Asus’s official community forum, states that full-functionality and a bug free experience cannot be assured with the beta build. It states that the purpose for this programme, as with other beta test programmers, is to get feedback from the community and implement it in the final Android 11 release. Notably, after enrolling into the programme, Asus will reveal on September 9 if you have been accepted or not.
The Asus ZenFone 6 was launched as the Asus 6Z in India back in June last year. It came with Android 9 Pie and at the time, the company had promised two OS updates. In November of last year, it was updated to Android 10 after a beta programme for the same was announced in July.