Try the page linked in my quoted post above for a TWRP that works with OOS 11. I haven't upgraded to 11.1.2.2 yet but when I do I will first try to just upgrade and keep Magisk in tact. TWRP is a secondary for me.
Also, did you disable/uninstall all Magisk modules before upgrading? That was the cause of my issues when I upgraded from OOS10 to OOS11. Deleting the Magisk modules directory's contents solved my boot issues. Can you still boot into TWRP at all? If not, I would try booting to Fastboot mode and then try the TWRP install process linked in my post above. Then delete the modules folders and files and see if you can get back into the OS.
Thanks! I did indeed disable all Magisk modules (since I don't use any ;-). I could still boot into TWRP, but trying any TWRP via fastboot gave me either a hang, or a Qualcomm crashdump. Still, things got completely stuck for me when trying to boot into OS...
Since I took a Nandroid just before that, I tried to restore it, which gave me a success message. Sadly, this bricked things almost completely, data could not be decrypted anymore.
Since I think all was lost at that point, I took the opportunity to switch to LineageOS. LineageOS Recovery did still boot and flash just fine, no idea why all TWRPs I found (all official, Mauronofrio and yours) gave me either a crashdump or got stuck....