While I was updating IOS 14.5 iphone7 did not restart

Force restart iPhone 7

Press and hold both the volume down button and the Sleep/Wake button at the same time. When the Apple logo appears, release both buttons.

Restore your iPhone, iPad, or iPod touch in iTunes onPC

1. Connect your device to your computer. You can connect your device using a USB or USB-C cable or a Wi-Fi connection. ... 
2. In the iTunes app on your PC, click the Device button near the top left of the iTunes window.
3. Click Summary.
4. Click Restore, then follow the onscreen instructions.

It sounds like you need to restore it through your computer.