Because the mastodon is part of the fediverse and by definition federated, you should use hashtags if you want to start generating a conversation on a particular topic. I suggest #ausmedpol or #ausmed. Note, the former is not a subset of the latter since searches will only return results if the string matches.

“All change!” https://nordocs.org.au/56-hot/1218-all-change
#ausmedpol

“All change!” https://nordocs.org.au/56-hot/1218-all-change
#ausmedpol