I don’t believe the default Lemmy interface supports it, yeah. I sometimes use Alexandrite and I don’t think it does, but not 100% certain. Haven’t tried Photon or any of the other options that may be out there.
If you’re on Lemmy.world, try:
Aledandrite - https://a.lemmy.world/
Voyager - https://m.lemmy.world/
Old Reddit - https://old.lemmy.world/
Photon - https://p.lemmy.world/
Tesseract - https://t.lemmy.world/
Not sure what others may be out there, but maybe one of them has the setting you’re looking for.
Edit: Alexandrite does seem to have a “system default” option, so if your system automatically updates theme based on time of day, that may work.
Edit 2: Seeing similar on each of the others, though how well each works, I’m not certain.








I think people just miss their niche interest communities.
For example, I love Elden Ring, but !eldenring@lemmy.world hasn’t had any new posts in almost a year. Meanwhile the Elden Ring subreddit has a bunch of posts just from the last few minutes.
Still not enough to make me go back to Reddit, but I admit it’s something I miss and something that just can’t be recreated without more people.