I'm pretty sure I installed everything from here
https://gitweb.gentoo.org/proj/qt.git/tree/sets except for qtwebengine as it takes a really long time to compile. It's possible one of the packages needs some USE flag I don't have enabled but that's going to be hard to diagnose.
When trying to launch actiona, 'segmentation fault' is the only error that appears in the terminal. I'm not sure if there is any way for me to get more information. I've also tried to build a simple AppImage from Debian, this also leads to a segmentation fault on gentoo, so I'm most likely missing some .so file. I was thinking of trying to build an AppImage with all required libraries built into the AppImage, that looks like it would be a big task though. Also ran it through wine but it does not manage to get control of the cursor through wine.