So, I guess I ****ed up... I was on 2021/03/29 and dirty-flashed 2021/04/01, getting a bootloop now... Any Idea how I could fix that without needing to clean flash? I was stupid enough to forget to backup data and apparently can't get to it through adb in the recovery. If you have an idea how I could access my data that would help as well, I already tried different recoveries, but could not decrypt the data partition with my pin. Thanks a lot!
EDIT:
For anyone ever panicking in the same way: I was able to decrypt the data partition with the twrp recovery from
https://xdaforums.com/t/recovery-3-5-1-unofficial-twrp-poco-f2-pro-redmi-k30-pro-lmi.4241707/ (older versions from mauronofrio and wzsx150 did not work) and can now adb pull my files and then clean flash, whew...