Thank you all for the comments. I believe all of what has been said makes sense depending on where you're coming from and the hardware you're using (pc vs mobile). I indeed think like it's been written below (above ) that having the response at the top makes a lot of sense for a post that someone is following. It is so much convenient to have the latest reply at the top.
A nice thing would be to allow "followed conversation" or "post in which you replied" to have latest on top, and for the other post, a more traditional way from top to bottom.
updated by @nicolas-fr: 02/16/24 04:36:15AM