iPhones and iPads cannot access the internet on home Wi-Fi

Ince it's incredibly unlikely that multiple devices would develop exactly the same bizarre fault simultaneously, the issue almost certainly lies with your network, your router, or your ISPs network.

This is not an Apple problem. You undoubtedly changed something on your router when trying to fix the problems with your TV's connection.

Restore your router from the backup you made prior to making changes or reset it to the factory defaults.

Are you running VPN? If so uninstall it.

Turn the router off for 30 seconds and on again,

Yes, you probably closed a port on your router that Apple uses to connect to the internet. Please contact your internet service provider support team and request they diagnose the issue from their end. They can dial in and run admin diagnostic tests faster and easier than you can.

If you can’t figure it out, you’ll need to hire a networking service and ask them to make a house call. Might be cheaper to buy a new router. What brand and model is your router?