I remembered wrong that immich has comment feature.
My thoughts of train was
What came to my mind missed your bullet points. Happy hunting.
Sorry didn’t read your post thoroughly.
Immich comes to mind.
AFAIR, Instagram started mobile only.
Then they made the service available in more platforms.
There was a time Instagram is only accessible using mobile apps.
I have kdeconnect on my i3wm.
Bluehost is a shit company. They will make changes to your domain record and make everything broken.
My MX records were removed when I did not extend one of the hosting with them.
Despite Malaysia’s U-turn on web traffic rerouting, the ‘damage has already been done’
https://www.straitstimes.com/asia/se-asia/despite-malaysia-s-u-turn-on-web-traffic-re-rerouting-the-damage-has-already-been-done