Run diagnostics on iPhone 11pro

Yes, but it's not the same as having your phone seen in-person. You can call Apple (in the US) at 800-MY-APPLE.

Why don't we take this a different direction and you tell us what you're having an issue with on your iPhone.

Schedule an appointment at your Apple Store Genius Bar, where Apple can run diagnostics on your iPhone.

Do you have a BestBuy store nearby? They are an Apple Authorized Service Provider.