The SIMCom 7080G modem chip upon which the EnviroDIY LTE Bee is built did not have Verizon certification until early August. Once they notified me, I asked SIMCom support what APN setting to use for Verizon, and this was their response:
Set you APN as follows:
We were able to get an EnviroDIY LTE Bee to connect to Verizon, using ModularSensors, by setting the apn to an empty string, e.g.:
// Network connection information
const char* apn = "";
Hopefully this helps anyone else who needs Verizon coverage with these newer modems.