5G SA on AT&T and Verizon

I’m using Quectel RM520N-GL and RG255C-GL Modems and I want to connect them to AT&T and Verizon 5G SA networks. Their IOT depts couldn’t help. Does anyone know whether these Modems are considered “devices” (as they carry the IMEI) and are therefore certified for connectivity to these networks. I’d be grateful for any advice as to how to get them to sell me a 5G SA capable SIM for a certified device that isn’t a phone. Thanks

Dear @FAL
These two modules have achieve AT&T certification.
But I am not sure whether it has any limitation for your device.