A beta version of the Android theme is already in as of 0.24.0! It’s still a work in progress, but Wefwef dev seems to move along at an impressive pace.

Settings > Appearance > Device Mode

I’ve used them for well over ten years at this point. Highly recommended from me too.

They used to be one of the more commonly recommended services a few years ago, but they seem to have sort-of slipped off most people’s radar. I’m not sure why.

Thanks for the info, Ada! That’s helpful.

I feel like it would be a well-used feature, if it was added. From that post I linked, it seems to have been been given some consideration, at least.