I started learning UE5 about a month ago and yeah, I’m in the same boat as everyone else here. Trying to drag anything in bluprint mode is impossible with a stylus but you can make it work if you map a controller to have left and right click functions. I already had a dualsense, with basically my entire keyboard, as well as mouse buttons mapped and you can get by.
Pro tip, try instead of tapping the stylus to click, do a little swipe to the right or left and it should register as a single click. I’ve found it works for most things. I’m only new, though, haven’t started actually painting landscapes or anything yet…