not sure how this is possible but i’ve found Shelly reporting updates available that aren’t shown in other packages managers
also, but Paru and Pacman report ‘nothing to do’
other thing is Shelly updates are often reported as coming from the AUR despite packages originally being installed via CachyOS repo’s
for example it currently wants to update OBS, Proton, and itself via the AUR, and reports 5 other updates from the standard repo’s that no other manager can is showing