AppImages, specifically LibreOffice.AppImage will not launch do to missing shared library.
To verify, open terminal and type:
./opt/appimages/LibreOffice.AppImage
if the app will not launch and the error “missing libicuuc.so.76” is displayed, you will need to install the library from the AUR.
From the terminal, run:
yay icu76
No need to restart system, AppIMages should work now.