Iphone cant connect to wifi home network

Started a few days ago, phone says "Unable to join the network" "This network is operating on Wi-Fi channels in use by several other nearby networks. Restarting your wireless router may allow it to automatically choose the best channel to use, and may resolve this problem."

Ive restarted the router and modem probably 10 times at this point. Called the internet people, they don't see a problem on there side and it must be a phone issue cause this is the only device that is having trouble. Called apple support, they said the diagnostics on the phone came back ok and it must be an internet problem.

Ive reset the network settings a few times, dont have a VPN, cycled location services, air plane mode. toggled the private internet under the network. IOS is 16.3.1.

The phone can connect to other networks fine. But not mine. Every other device in the house is fine. Its only this iphone that is having trouble. Other phones running Wi-Fi 6e, other devices running 5g and regular 2.4 are all ok. This is the only apple product in the house also.