after a recent linux upgrade, i found that appimages stopped loading - double-click, nothing. the log complained that '#appimages require #fuse', which led me to the article at bottom - you still need fuse 2 even though the os has moved on to fuse 3.

sudo apt install libfuse2

only libfuse2, not fuse or any other package - those may remove bits of fuse 3 that you do need.
#appimage #fuse2 #fuse3

https://www.omgubuntu.co.uk/2023/04/appimages-libfuse2-ubuntu-23-04