Basically your post is already "posted" there. Anyone with a mastodon account on an instance that federates can see it. They could either paste on their mastodon search interface the url to this post and see it appear as a mastodon message. They could then reply on mastodon and it would show for you here on your lemmy instance.
They could also follow your account on mastodon or a community just as if you were a mastodon user and then see your posts on their timeline.
Don’t forget the fascist SVP party getting fucked there as well, it has been rare in the past 25years that they lose.
They were literally saying the following on their websites a few days ago:
Please don’t threaten me with a good time lmao