Oneplus 9pro BA version here.
Just updated from F72 to F74 without any issues.
With Magisk Delta installed:
Deactivated all the modules. (currently only Revanced and Zygisk Lsposed)
Uninstalled magisk, restored stock boot in the process.
Downloaded the update via normal system settings. Let it do its thing.
Phone rebooted and was updated to F74.
Opend magisk delta, gave me a prompt to reInstall since root was lost and I had it renamed. Maybe next time restore it first. Clicked yes, no issues.
Then patched the stock boot provided by SnoopyFTW
HERE in Magisk Delta.
Downloaded the patched boot.img to my PC,
Fastboot boot that patched boot.img to get temporary root
Direct install in Magisk Delta.
All good.
Reactivated modules. Updated revanced.