WWAN unlocking on Spiral Linux

(my first post on lemmy so I hope I'm doing this right)

Distro: Spiral Linux (Debian, KDE spin), by recommendation

System: Lenovo ThinkPad X13 Gen 2 (Intel) (distro recommended as I am looking for Debian(-based), + btrfs, snapshots, and fde, included via the gui installer)

I'm having issues getting ModemManager to unlock my X55 modem. This morning I wiped my drive to install Spiral (KDE), coming from Kubuntu 24.04. While the modem worked after running the proper fcc unlock script in Kubuntu, it is entirely missing in my Spiral install. While I assumed that it would not be that simple, I copied /etc/ModemManager from my Kubuntu live environment to Spiral, ran

sudo ln -sft /etc/ModemManager/fcc-unlock.d /usr/share/ModemManager/fcc-unlock.available.d/105b:e0ab

and restarted, but alas that's not enough, so I'm stuck. I have added the network profile + apn to ModemManager (the UI) but of course without the modem unlocked, I can't connect. I'm new to cellular modems in Linux (this was a windows machine until ~6 weeks ago) but I'm otherwise comfortable with the terminal and commands. The modem was working as expected last night in Kubuntu.

I haven't got the system setup yet (trying this first before going further) so if I botch this, an install is no problem. I'm assuming it's either (or both?) a service, or a missing package that sets up what's needed, but I'm at a loss as to how to proceed.

I discussed this here https://lemmy.world/comment/10540509 this morning, though I think I got all the important details typed up above. But maybe it could be useful somehow.

Any suggestions are welcomed :)