Make and Model are Broadmobi BM818 (no need for any tricky commands because they are the same for everyone)
That just leaves the variant unknown.
You could either take a punt that the variant you have is -A1 (for North America) or check it, with greater hassle, using: https://source.puri.sm/Librem5/community-wiki/-/wikis/Tips%20&%20Tricks#executing-an-at-command-on-the-modem