I have not used X so far, only Facebook.
And in the proper Facebook groups, people always reply, even in very small groups, for example with a few hundred members.
Especially with unique content.
I rarely write comments on YouTube.
I mostly watch videos, and I read comments. If you look for entertaining videos, then you can see that the comments are often funnier than the video itself.
And if you look for a conversation, then it is probably best to watch educational videos.
Good for you, if Hive is socially properly working for you. Socially it works only for a very few people.
It is very hard to find/reach people on Hive, who are actually interested in the content, even with unique contents, which are naturally standing out on other, socially properly working platforms.