Help with Icons in Notebook Title

Hopefully I can get some direction here.

I''m running EndeavourOS, which is an arch based distro for any not familiar with it.

Been using Joplin for a while, and Recently started adding Icons to my Notebook Titles like so:

the icons I'm talking about

This works fine, but only with the Flatpack version of the App.

Please bear with me at this point. With the Appimage version, and the version(s) in the AUR, these Icons seem to not work for me. They show up as blank, sort of like the old Broke-image placeholders in a browser. I have no clue why.

proper theme but no icons in Appimage version

This didn't bother me much, simple solution, just keep using the flatpack. But just recently the flatpack version updated and broke my theme.

With the theme set to Dracula, the menu bar and some other elements are white and look fairly out of place:

Icons, but Broken Theme in Flatpak version

So now, if possible, I'd like to either: a) fix the theme on the flatpack version b) get the icons to show up properly on any of the other versions.

Any and all help would be greatly appreciated.