Did you use the 2022/06/30 build? That one is new. I think you tried the old one.
I installed the build of 2022/06/30.
However, there was no sound on the ZE601KL.
It seems that all versions of ROMs have to use audio patches to make sounds with the ZE601KL.
The 5-inch model doesn't seem to need a patch, but the 6-inch ZE601KL seems to require a patch.
Creating audio patches seems to be very difficult, and Android 9 seems to be the limit.
It's still difficult for Android 9 and later patches to not be available, so no one seems to do it ...
I am translating Japanese into English using Google Translate.
I'm sorry it's hard to read.