IOS 16.1 BUGS

If Wi-Fi will not connect 

·      Reset the router to factory settings (menu or paper clip) – even if all other devices connect OK!

·      On iphone Settings, General, Transfer iphone or reset, reset, reset network settings

·      If you have a VPN you are strongly recommended to uninstall it and its profile in Settings, General, VPN and device management

Also Settings, Privacy & Security, Location services, Systems services, turn off Networking & wireless and see if it helps.

Also see Check VPN to resolve problems and connectivity issues

Check VPN (Virtual Private Network) and third-party software to help resolve network connectivity issues - Apple Support

Here's some more steps you can try for Wi-Fi connection issues that may be helpful if your phone will not connect to WiFi

If your iPhone, iPad or iPod touch won't connect to a Wi-Fi network – Apple Support (UK)

After I update my Apple TV to 16.1 it drops Wifi 1-4 times a minute. It loses wifi for about 1-10 seconds. 

Same thing happened on my iPhone 12 pro max after update.

On iPhone I was able to solve the problem with this fix.

* 1. Open Settings and scroll for Privacy & Security.

* 2. Tap on Location Services (they should be turned ON).

* 3. Scroll all the way down to System Services.

* 4. Turn OFF Networking & Wireless.

But can't find any solution for Apple TV.