Doesn’t show where I must update my iPhone

Enable full-power mode, remove any add-on first-few-hops VPN client app, free up sufficient storage, remove any beta profile, force-restart, connect to Wi-Fi, and try the update again.

Links…

Update iOS on iPhone - Apple Support

How to uninstall iOS or iPadOS beta software - Apple Support

Force restart iPhone - Apple Support

If the update fails, use a Mac or Windows PC to update.

Settings > General > Software Update (you’re in Settings > General > About):

awudu16 wrote:

There is no software update on my General about settings

Is your use of this iPhone associated with an organization, and this iPhone managed or supervised? If so, contact the IT organization managing this iPhone.

Is Focus or Screen Time enabled? if so, disable that, and check again.

You've gone too far into the Settings.

You should find Software Update one step back from where this screenshot was snapped, and one line down.

Settings > General > Software Update.

There is no software update on my General about settings