@cleo @MiaWinter @puniko @ivory @paul @adora
The server-to-server API running the fediverse is mostly unified (apart from minor feature completion issues). But the server-to-client API between Mastodon and Akkoma is slightly different. With Ivory mostly being advertised as a Mastodon client, I can understand that they don't want their users to report bugs with servers that aren't actually fully supported.
For the technically interested, see https://docs.akkoma.dev/stable/development/API/differences_in_mastoapi_responses/