GAMDIAS Keyboard remapped as shift

I am using a GAMDIAS keyboard, which from issues in ubuntu i learnt only supports windows, and if i press alt/ctrl/winkey then the computer believes shift is being pressed.
In the past, i used this to fix the issue, however that is for ubuntu and i am new to arch/kde so have no knowledge of any working fixes or where to begin, since a quick google didnt provide much.

Using the KDE Plasma version from Endeavor OS, and can provide any logs/information with a short delay.

Does anyone know how i can fix this? until i do so, even copying/pasting is painful and i will be unable to play any games without multiple ragequits :smiley:

As a side note, anyone know how i can have a different desktop background on each monitor?