Perhaps a silly question, but are you using an M1 Mac?
Yep 🙂 Mac Mini M1
Sorry to hear about your experience. You should try signing out & signing back into Creative Cloud desktop app. Additionally, you may follow the suggestions given on this UserVoice post if you do not see the Adobe Illustrator Beta (Build 25.3.1) in the Beta apps section on Creative Cloud.
Hope it helps.
thank you very much, that works 🙂