Not that I knew of. I do have appimagelauncher but it is set to not automatically do anything. My ~/Applications folder is empty.
Nevertheless, I know that some AUR packages unpack from or use (?) AppImages, so here is my pacman -Qm. Note that all this worked before the update, for several weeks, without problems.
$ pacman -Qm
anydesk-bin 7.0.0-1
appimagelauncher 2.2.0-9
backintime 1.5.5-1
backintime-cli 1.5.5-1
cinnamon-sounds 1.8.9-1
circle-flags 2.7.0-1
cp210x-overclock-dkms 0.1-1
espanso-x11-bin 2.2.3-2
geany-plugin-preview 0.1.2-1
gnome-online-accounts-gtk 3.50.6-2
goldendict-ng 25.5.0-1
hypnotix 4.9-1
ibus-autostart 1.3-1
idjc 0.9.9-1
jellyfin-media-player 1.12.0-3
libeb 4.4.3-12
libpamac-aur 11.7.3-2
libshout-idjc 2.4.6.r1-1
lightdm-settings 2.0.7-1
marktext-bin 0.17.1-2
open-adventure 1.16-3
pamac-aur 11.7.3-1
piper-tts-bin 2023.11.14-1
piper-voices-common 1.0.0-5
piper-voices-de-de 1.0.0-1
piper-voices-en-gb 1.0.0-2
piper-voices-en-us 1.0.0-3
pulsar-bin 1.128.0-1
python-cinemagoer 2023.05.01-1
quickemu 4.9.7-1
simplescreenrecorder 0.4.4-3
thorium-reader-bin 3.1.0-2
timeshift-autosnap 0.9-1
webcamize 2.0.1-1
xwinwrap-git r20.539fc47-1
A quick find for AppImages did also not find any:
$ sudo find / -xdev -iname "*.AppImage"
$