The update of ver.11.2.2 is never completed the download, what should I do

Shutdown Router. Shutdown Computer. Connect to Router via Ethernet cable. If not possible and via Wifi - disconnect all Other Devices using the Wifi. Restart Router. If using Wifi - move computer as close the Router as possible. Restart computer and Immediately hold - Shift - key. Safe Mode will do a Repair Disk, clear cache files and Only Load Apple Software and Fonts. Loads Slowly - normal. The machine will look and perform differently - Normal. Attempt the 11.2.2 update again.

Important - is there any AntiVirus Software installed ? If so, before attempting - Remove this $%^*ware before attempting the 11.2.2 update. It is totally not needed, causes havoc, interfere with the normal operation of the OS and can even corrupt the OS. Effective defenses against malware and other threats. If this does apply - disregard

And how is it going in your other posting https://discussions.apple.com/thread/252532412

Seriously, you shouldn't need to shut down all your devices etc etc just to do an update. Every since they changed from Catalina to Big Sur there's been nothing but problems

New OS and transitioning from Intel to Apple Silicon - learning curve for us all