So is the mobile-broadband-provider-info package used on the Librem 5?
Looks like it is installed:
purism@pureos:~$ apt list -a mobile-broadband-provider-info
Listing... Done
mobile-broadband-provider-info/amber-phone,now 20201225-1~amber1 all [installed,automatic]
mobile-broadband-provider-info/amber 20170903-1 all
and there are lots of providers in the xml file /usr/share/mobile-broadband-provider-info/serviceproviders.xml
Does this mean that we can get correct APN settings already by default, without entering anything manually, if that package has correct info about the provider?