This repo used to make appimages from the portable linux binaires that ryujinx released since they never released an appimage, but now there is a better alternative.
Unofficial AppImage of the Ryujinx emulator: https://github.com/Ryujinx/Ryujinx
Uses the portable release of Ryujinx and turns it into an AppImage: https://github.com/Ryujinx/release-channel-master
You can also run the ryujinx-appimage.sh script in your machine to make the AppImage.
It is possible that this appimage may fail to work with appimagelauncher, since appimagelauncher is pretty much dead I recommend this alternative: https://github.com/ivan-hc/AM
This appimage works without fuse2 as it can use fuse3 instead.