Qtractor and libsuil

Hello again! During the Qtractor builds I've been doing over the last few days, there's something I noticed with libsuil that I wanted to ask about...

When the build is listing the prerequisite packages found, it prints this line:

LV2 plug-in UI support (libsuil) . . . . . . . . .: no

But I have libsuil installed (on Manjaro), here's a list:

03:02 PM : scott@BigDog> ll /lib/libsuil*
lrwxrwxrwx 1 root root  20 Nov 20  2021 /lib/libsuil-0.so -> libsuil-0.so.0.10.10*
lrwxrwxrwx 1 root root  20 Nov 20  2021 /lib/libsuil-0.so.0 -> libsuil-0.so.0.10.10*
-rwxr-xr-x 1 root root 18K Nov 20  2021 /lib/libsuil-0.so.0.10.10*

Ohhhh... I decided to look into CMakeLists.txt, and I see part of the config is to disable libsuil if we've got Qt6 or better. So my revised question becomes "What are we missing by omitting libsuil, and is there a way to compile the project with Qt5 (which is also installed on my system) so the build can pick it up?"

I looked up the Suil package at drobilla.net...I think I understand what it's for. Does omitting it mean you can't display native plugin GUIs if they were written with a graphics toolkit other than Qt?