iPhone 13 stuck on verifying udate

1. Make sure you are connected to a good WiFi connection.
2. Turn off your VPN if you are using one.
3. You need to have at least a 50% battery charge and preferably connected to power.
4. Turn off Low Power mode.

Hello

1. restart your iPhone
2. Try using iTunes
3. take a look If your iPhone, iPad or iPod touch won't update – Apple Support (AU)