mobile network unavailable

I've got a Moto G Stylus 5g 2021, AT&T branded but network unlocked. I cannot place or receive phone calls at all. A couple days ago I managed to seemingly fix it by going into advanced Mobile Network settings and switching to the AT&T network, which said unavailable,  and back to the T-Mobile network,  but that was in town and when I got home it didn't work anymore. I've tried that again, except switching to the Verizon network since there isn't any AT&T at my house,  but when I switch back to T-Mobile I get a notification that the mobile network is unavailable. My phone is showing full bars of 5g on the T-Mobile network but I still cannot place or receive phone calls. I've tried updating my APNs with the info provided on T-Mobile's own website and it did nothing.  Someone on another forum suggested turning on VoLTE but I don't have that option in my settings and the number provided on another forum to access hidden menus didn't work either. I am at my wit's end here, and I need to be able to make calls.