Now in #Pachli Current: viewing the "detailed" version of a post (the one you see after tapping on it) now shows -- next to the number of boosts and favourites -- the number of times the post has been quoted (if this is your post, Mastodon doesn't let you see this information for posts written by others).
Tapping that number will show you a timeline of those posts so you can see how you're being quoted, and, optionally, remove your quoted post from them.