My iPhone 7 won't turn on; stuck on the Apple logo

https://support.apple.com/en-us/HT201412

If regular troubleshooting won't help, and because it's iPhone 7, I would take it to a third-party repair shop or Apple Store as this could be a hardware issue (Audio IC failure also known as "loop disease").

Hi, please try the instructions mentioned this article -->>If your iPhone, iPad, or iPod touch won't turn on or is frozen - Apple Support to return your iPhone to normal state.

Axel F.