I was able to get it on the s21 ultra. My carrier **bleep** up on the esim setup and took me down the whole day. Had to uninstall the beta...now I can't get it back.
I was in the beta on my unlocked s21 ultra and it was very unstable for me. My phone would frequently crash and restart. Several apps didn't work. Lots of lag when scrolling. I went through the troubleshooting such as clearing cache, factory reset, app reset, etc. Nothing worked so I reverted back. While there are some cool upcoming features it wasn't worth the headache and nonfunctional phone.