ReillyBrogan edit:
boot up,launch terminal
flatpak update -y && flatpak remove --unused -y
ID Branch Op Remote Download
1. [✓] org.kde.Platform.Locale 5.15-23.08 u flathub 18.0 kB / 377.8 MB
2. [✓] org.kde.Platform 5.15-23.08 u flathub 15.4 MB / 335.1 MB
Updates complete.
flatpak run us.zoom.Zoom
---no launch, no flicker.
reboot solus, launch terminal
flatpak run us.zoom.Zoom
launches for 2 seconds, disappears
menu doubleclick: same^^
*conclusion, nothing appears to have changed from the kde update.
**hunted about 20 min last night found no issues with this except a 2020 thread that said freedesktop rebuilds were sandbagging zoom so wait for update, etc.
2nd EDIT: Unlike OP, I am getting no terminal output at all.