I successfully got the TWRP working using Odin from this https://forum.xda-developers.com/galaxy-a6/development/recovery-twrp-3-3-1-galaxy-a6-t4028315 thread, did FORMAT DATA and then flashed no-verity-opt-encrypt-6.0 and then RMM_Bypass_v3_corsicanu but it gave me error saying Unable to decrypt FBE device. I was on Android 10, now going back to stock Android 9 cuz Android 10 isn't available to download. Can you please tell me where I went wrong?