Is it possible to cross-post a post containing just the content?

I think I have my feed currently setup properly between my blog and micro.blog. I can create a post in my Notes collection, and by utilizing the RSS Feed, I see it on micro.blog as expected.

The problem comes when trying to cross-post. I want to cross-post to Mastodon, Bluesky, and Threads. When I create a post, it’s just a title and link to my original blog post.

Is it possible for these social media platforms to just show the content, exactly like micro.blog currently does? Do I need a specialized RSS Template?

TIA!

Posts with titles are assumed to be “macro” and will post that way. RSS feed items without content will syndicate more “natively”. At least that’s how I understand it.