If I understood right you can’t barely find anything that way from Mastodon.
For me the issue of this kind is conversation itself. Because everything are reboosts I must find the first post before I can get the whole topic, because comments of a reboost are never shown to followers. So that conversation will be vanished.
And if I reboost a comment from Discouse it will shown by ”user-actor” that can’t be followed.
That, and defenetly lack of (hash)tags are the major questionmarks now — for me, anyway.