Text Won't Render in Team Fortress 2 On Custom Image

I’m on a custom image of UBlue I made myself with Xfce and TF2 (through the Steam Flatpak) doesn’t render any text in game. I’ve found some old issues mentioning fonts not being installed, however I have Liberation installed which is supposed to cover the Microsoft fonts. I also checked the RPM package from RPM Fusion and I don’t seem to be missing any dependencies there either.

For a list of installed/removed packages from the original Vauxite image, check these files here: extant-os/packages at dev · ElliotLurie/extant-os · GitHub

What am I missing?