Hollo 
Thanks to @thisismissem, Hollo 0.2.0 will support reporting remote users and posts! As it implements Mastodon-compatible API, any Mastodon clients that implement reporting could work with Hollo 0.2.0.
If you want to try it in advance, please give ghcr.io/dahlia/hollo:0.2.0-dev.185 a try (or just canary)!
Emelia 👸🏻
Got bored today so hacked up basic support for the Mastodon Report API for @hollo — https://github.com/dahlia/hollo/pull/41
It only supports reporting remote posts/actors, although does keep a record of sent reports (even though you could technically do fire-and-forget, it's not a great practice)
That's my little gift to @hongminhee for all the fantastic work they're doing