What is this ? I update my phone now I need to do this extra steps

It is your carrier not Apple.

Check for carrier update.

Settings, General, About

or read this https://support.apple.com/en-us/HT201415

I'm not going to waste time arguing over facts, did you check where I said and read the article and tried all the actions?

Most users follow the instructions successfully.

It is a particularly American thing where cell carriers try to control your phones, doesn't happen where I live.

But don't let facts spoil a good argument.