Can't click any of my apps, power button not working, What should I do?

See -> Related Article - > If a button or switch isn't working on your iPhone or iPad

& click -> Set up an iPhone repair

Or visit an Apple Store or an Apple Authorized Reseller in your region for assistance to diagnose the problem.

And they could offer a possible solution.

You will first have to make an appointment due to the pandemic.

See: Contact Apple for support and service

Contact Apple for support and service - Apple Support