Has scrollable interface for scheme scripts in GIMP 2.10 been solved?
If it hasn't been solved (since I couldn't compile the source because config.h is not found anywhere).
here's a work around.

The downside is that an individual .py has to be written for each scheme script. The plus side is gimpfu.py scrollable py plug-ins work for 2.10 and there aren't too many scheme scripts that need the scrollable interface (at least I haven't seen too many).
more details here =>
https://gimplearn.net/viewtopic.php/Scr ... 856#p19856