phone won't ring calls go straight to voice mail

Just to share with you, it may help. On Pixel 6a, you set

Settings > Network & Internet > SIMS > Preferred Network Type > 5G (recommended)

and scroll to the end in [Access Point Names] check both

[Allow 2G] and [Vo5G]

I guess your voice is going through Vo5G now but you did not enable it, your phone still uses 2G, 3G and 4G/VoLTE for voice. I don’t see anyone would like to limit your phone to 2G, 3G or 4G networks because of voice call. In stead, you should enable Vo5G and use 5G networks.