Hi Hpros,
Thanks for contacting Apple Support Communities!
We understand that your iPhone display isn't displaying the screen as you'd expect.
It's likely that your iPhone may require service. In the meantime, you can also try the troubleshooting steps outlined here such as restarting the iPhone and disconnecting any accessories, if you have any connected: If the screen isn't working on your iPhone or iPad
"If your screen is too sensitive or responds intermittently to touch
Restart your iPhone or iPad.
Make sure that your screen is clean and free of any debris or water.
Disconnect any Lightning or USB-C accessories. If your screen works after removing an accessory, try using a different outlet, cable, or charger.
Remove any cases or screen protectors.
Contact Apple Support
If your screen still isn't working, you might need to set up service for your device. Contact Apple Support."
If your iPhone does require service, you can reference the link above to contact Apple so they can go over your options with you.
Take care!