@pancake Fediverse SW (plz don't just promote Mastodon) have nice open API's so we can go nuts with our ideas without going through standardization rituals.
A quick search got me this little tool:
https://codeberg.org/MarvinsMastodonTools/feed2fedi , and IIRC there was some service that did the same without coding/hosting yourself.
On the other hand I use Fedi as an RSS _generator_, so I kind of agree that having some features built-in makes a difference - question is how we determine if the API is not enough?