WiFi Calling not Working on Pixel 6

Hello. I installed IODE OS on 2 different Google Pixel 6 devices. The OS is practically flawless. Love it! The only issue I have is no WiFi calling. I have it enabled, but when I put the phone in Airplane mode (with WiFi on) it gives the error message: “Turn off airplane mode or connect to a wireless network to make a call.” I tried resetting the networks (mobile and wireless), but the error persists. It is as if the phone does not recognize the setting.

I installed on a second Pixel 6 to see if it was something with the phone, but I have the same issue on the second device.

Any recommendations to remedy this? Thanks!

-Goose