I have a S20 FE. I did the suggested update (to Android 12?). But i still get the message: update delayed/postponed (don't know the right english word, the language on my phone is dutch). I even did the update several times, but the message remains. What to do?
In your about phone does your software information show as the update has completed i.e shows Android ¹² ?
If so try a soft reboot by turning the phone Off and On.
If no joy then try > https://www.samsung.com/uk/support/mobile-devices/how-do-i-clear-the-cache-on-my-device/ You may need to insert your earphones or hook upto a powered On Laptop to access the Clear Partition Section. This may help with lag or stutters as this clears the phone of old/unused or broken cache files.There is also a Repair Apps option in the Menu System too.
A very last resort back up and factory reset.
I wish you all the best.
Daily Driver > Samsung Galaxy s²² Ultra 256Gb in Phantom Black.
The advice I offer is my own and does not represent Samsung’s position.
I have no affiliation with Samsung.