Oddly "My Articles" for Pocket is still under "More", I guess it uses a separate account. I've not used Pocket for years and never on Kobo.
Also gone from "More" is My Wishlist and "Activity", but "Activity" (without Rewards) is moved to main screen menu instead of "Discover".
"More" -> "Settings" loses "Syncing and Updates". AFAIK Sync only works with Kobo ecosystem / books bought from Kobo. However Sync & Update still works from main screen Top Menu Icon bar. "Sync complete. Sign in for extra features." Note, I didn't sign out / deregister, the extra setting makes it behave the same as unregistered.
Updates still work via Calibre or direct download to PC and unzip to .kobo
Various FW
https://pgaskin.net/KoboStuff/kobofirmware.html