@WomanCorn I haven't yet found a client that solves this problem
@realcaseyrollins @TetraspaceGrouping
Here's some screenshots. The reply (from Tetraspace) doesn't have an obvious indicator that it's part of a thread.
By comparison, Twitter shows the first post in the thread and has a little line down the side, and a link to the thread expansion.
@WomanCorn @TetraspaceGrouping #TwidereX does this, but I think it's literally the only one that does. Perhaps the official #Mastodon app shows threads this way, as I believe the #TwidereX team works on the official #Mastodon app as well.