I’d like to point out that the commit mentioned came from upstream: USB: serial: option: support Quectel EM060K sub-models - kernel/git/stable/linux.git - Linux kernel stable tree. New hardware support gets committed upstream all the time.
As many of you know I am more focused on our laptops and computers than the Librem 5 (though I do use a Librem 5), so I don’t know anything specific about this modem or how the telephony stack would relate to it, I just wanted to point out that this came from upstream in the context of speculation going on here.