Just spent several hours fixing the “No service” cellular issue in my Lenovo T14 AMD Gen 2 with Quectel EM120R-GL. The notebook was able to search for networks (when disabled the automatic network selection), but was not able to connect to internet (Vodafone CZ mobile provider).

It was more and more obvious that the issue is related to the APN profile.

In the end I found the right settings which connected the notebook to mobile internet almost immediately: