Max Adapter 4G LTE and 5 G

I just purchased 2 Max Adapters, 4G and 5G. Activated each with separate T-Mobile Sim cards. Works as expected on my laptop.
But, unable to get these devices to connect to the internet on any other Windows 10 computer.
I am using Peplink Connection Manager 2.1.1 Build.
Pepwave is identified as a network adapter in device manager.
But I do not see it (T-mobile) in active network connections.
The cellular tab allows me to “connect” and it shows “connected” with an icon showing signal strength. But no internet connectivity.
I tried pinging to and it failed.
Please help. Thanks.