How do I fix iPhone 16 Pro stuck in welcome page during initial setup?

Try a Forced Restart:

1. Quickly press and release the volume up button.
2. Immediately quickly press and release the volume down button.
3. Immediately press and KEEP HOLDING the side power button. KEEP HOLDING it until the screen goes black, ignoring any sliders and KEEP HOLDING it until you see the Apple Logo, which can take up to 30 seconds.
4. Once the Apple logo appears, let go and your phone should restart.

I'm guessing that it may have had something to do with the Moderator entry there to re-title since it did not have an initial response. I couldn't help but make a comment. Guess I'm in one of those moods today. 🤣

While as always, I applaud your dedication to work here, I wondered if you noticed the date that was posted.

It appeared as a new post on the top, so I didn't notice the date at all. I imagine someone posted something to it, which was removed, leaving the original post to stand. Ooops!

No worries, I never mind when it's pointed out I may have messed up. One would hope they have resolved their issue by now.