astro_ray

https://github.com/vinceliuice/Orchis-theme Try this theme. It has some fix for libadwaita app. Although, your issue could be because of flatpaks. Any chance your flatpak apps are not getting themed?

There is a hacky way to turn the background pitch black using css. There used to be an app that I think could change the background. https://github.com/GradienceTeam/Gradience

Tumblr will probably join fediverse soon, if the announcement is correct. A lot of people are asking about Pinterest alternative in fediverse, but I never saw one. Btw, for anyone looking at a Flickr alternative, I feel like they should look into https://vernissage.photos/ .

https://apps.apple.com/us/app/sorasns-for-mastodon-bluesky/id6450969760

This is a pretty nice app for apple devices.

https://github.com/suvam0451/dhaaga
This app supports Mastodon, BlueSky and Misskey (and some other *key forks)