Help me update my phone

https://support.apple.com/en-us/HT204204#:~:text=Update%20your%20iPhone%2C%20iPad%2C%20or%20iPod%20touch%20wirelessly&text=Plug%20your%20device%20into%20power,Tap%20Install%20Now.

Here's the answer, have a nice day

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See the articles below.

Get help with over-the-air iOS updates  -

Update – Can’t or can’t restore   -

Have you tried using iTunes on a computer or Finder if running Catalina or later to do the update?

Update software on iOS devices in iTunes on Mac. -

Phone, iPad, or iPod touch - Update with Finder.  *

iPhone, iPad, or iPod touch - Update with iTunes.  *

If you see an error when you update or restore your iPhone, iPad, or iPod    *

Updating iOS: common issues and solutions.  -

ASC YouTube for  how to update your iPhone, iPad, or iPod touch to the latest version of iOS or iPadOS —wirelessly or using your computer.