iphone 7 stuck in boot loop

Battery? Digitizer? Other Internal component?

We, just users like you, cannot diagnose that kind of issue remotely, sorry.

Try a forced restart (to check if it is a temporary problem) using these instructions:--> Force restart iPhone – Apple Support

If the issue persists, contact Apple Support using this link:--> Get Support or, even better, make an appointment (*) and have your device inspected at an Apple Store or AASP (Apple Authorized Service Provider) among this list:--> Apple – Location Selector. After checking it out, they'll give you all the available options.

Regards

Giulio

(*) You can do it:

• Online:--> Genius Bar Reservation and Apple Support Options - Apple;
• Contacting a local Apple Store or AASP among the list provided above;
• Using the "Apple Store" app, available and downloadable from AppStore.

Please follow the steps in the following link for support with this issue: If your iOS device restarts or displays the Apple logo or a spinning gear unexpectedly