@Shivaekul @seachanger The problem is that as far as Mastodon and most other contemporary ActivityPub implementations are concerned, the parent post is barely involved in what counts as a reply. Replies are not distributed by the parent post, and the replies collection on it is not considered normative. Replies are distributed exactly the same as standalone posts, and the attachment to the parent post is considered simply metadata. Reworking this architecturally is where the complexity lies.