when an app is available form multiple sources you can choose which one you'd like to install from. the list of options strangely shows a checkbox icon as source icon.

STEPS TO REPRODUCE
1. have flathub/kdeapps flatpak remotes set up
2. go to kamoso page
3. click on sources in the top right corner

OBSERVED RESULT

strange checkbox icon

EXPECTED RESULT

an actual icon of some sort, or none, but certainly no checkbox. ideally perhaps simply use the icon set as Logo in os-release? https://www.freedesktop.org/software/systemd/man/os-release.html#LOGO=
if that seems useful there is an OSRelease.cpp in kinfocenter you can copy to parse the file.

SOFTWARE/OS VERSIONS
Windows: 
MacOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION