iPhone 12 Pro not connecting to WIFI

That is usually a hardware problem, especially if Bluetooth cannot be turned on either. You can try a restart, and restoring iOS using your computer. But if neither of those work you should contact Apple to discuss repair options.

Then try a restart, and if that doesn’t fix it reinstall iOS from your computer. It can still be hardware, especially if you have recently dropped the phone or it has gotten wet.

"iPhone 12 Pro not connecting to WIFI: My phone is not allowing me to turn my WiFi on. I cannot even search for nearby WiFi. When I press it on, it 'searches' then automatically turns itself off without ever connecting. I’ve already reset all my network settings to no avail. Anyone have any advice? In the picture provided I can’t even switch it on."

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Thank you for the screenshot.

Troubleshooting iPhone WiFi:

Some Thoughts...

A. Start Here: If your iPhone or iPad won't Connect to a Wi-Fi Network - Apple Support

B. Disable Cellular:

Try disabling Cellular, and using Wi-Fi instead, seeing if that makes all the difference.

C. Disconnect from a VPN:

Are you using a VPN? If so, disconnect from it. Security Software just gets in the way on an Apple device, and this is a pure exact of how and why. So, uninstall it, unless require for school or work.

D. Clear Temporary Internet Files:

If connecting is unsuccessful, try clearing out your Temporary Internet Files: History, Cache, and Cookies

As a Last Resort:

E. Restore form a Backup:

Have a backup of your iPhone? If you are not concerned with losing data, then restore your iPhone from a backup that was made when Wi-Fi was working. Prior to restoring, backup your iPhone, incase anything goes wrong with the restoration.

None of what you posted has anything to do with a Wi-Fi switch that won’t turn on.