What do you do when an iphone 7 plus is being restored but the line doesn't move

Hello cameelia.

Thank you for using Apple Support Communities. It sounds like you're experiencing issues not being able to restore your iPhone. If so, we can understand how this would be an issue. We also notice that you're coming from the following resource below:

If you see an error when you update or restore your iPhone, iPad, or iPod - Apple Support

If you're unable to successfully restore your iPhone, you'll want to follow the steps listed in this reproduce here: If you can't update or restore your iPhone or iPod touch - Apple Support

Be sure to follow all the steps listed within. We hope this information is useful. Cheers.