iPhone X clicking by itself

Hi! Your IPhone is clicking by itself?

Have you tried restarting your device? https://support.apple.com/en-us/HT201559

This could also be a hardware issue.. You can contact Apple suport https://getsupport.apple.com/

Or go to an Apple Retail Store

Regards

Nicki

See if your device falls into this group, iPhone X Display Module Replacement Program for Touch Issues - Apple Support

If it only happens when it is plugged in you need a new Lightning cable.

If it happens all the time you need to have your display replaced by Apple because the screen digitizer is failing.