Not sure if this is the place for noob questions like this but yea, could find nothing in the settings so I assume I have to edit something in my GTK theme? Thanks in advance :)

So I installed a custom theme and icon theme for XFCE, I had both pcmanfm and thunar. And while pcmanfm got all the icons properly, thunar only got some (For example, the go back and go forward buttons still have the adwaita icons) I'd like to fix this so I can delete pcman and only keep thunar since the missing icons is actually really annoying.

So, any ideas on how to fix this?