Question How do change back to Android 11?

[DerFetteNette]

Hello there,
I installed the ArrowOS ROM with Android 12 and I want to change back to Android 11.
How can I do this? Does TWRP even support Android 12? Do I have to wait for Android 12 support?
EDIT: @astronomy2021 already asked this question and I think I have the awnser.