I am using XFce4 on Debian 10.
When opening GTK 2 apps, the scroll bars appear normal, with a large bar and arrows at the top and bottom.
When opening GTK 3 apps, the scroll bars are thin, difficult to click and see, have no arrows anywhere, and sometimes completely disappear.
If I choose a theme like Adwaita or Breeze, then GTK 2 apps match GTK 3 apps, but using the difficult-to-use-and-see scroll bars.
Is there any way to give both GTK 2 and GTK 3 apps a more traditional scroll bar with the larger buttons?