snake io right now, it works for me. Later, I'll see about moving the block to the top of the comment. If you wanted to modify the inserting portion, you would also need to make some further changes to the Javascript code.

Yes, The way discussions are presented in a publication can be changed. Usually, the content management system (CMS) or discussion platform of the publication ovo game determines the order in which comments are shown.

Thank you very much, it works quite well. For the moment it suits me, later I'll see to move the block to comment up.
Thank you for your help

Well,
a first idea would be to reverse the order of found comments in
components\OssnComments\plugins\default\comments\post\comments.php
and the other 2 files in the same directory by changing
foreach ($comments as $comment) {
to
foreach (array_reverse($comments) as $comment) {
which results in a view like

The irritating part starts when adding the next comment c3
which wouldn't be inserted on top but at the bottom like

Refreshing the page would show the correct order of course

but all in all this solution isn't really satisfying to my opinion and appears as only half-done.
So it would also need some more changes in the Javascript code if you want to change the inserting part.

I found
https://github.com/githubertus/opensource-socialnetwork/blob/1acb5bedd936837438aabbb0c2b84d57d4ff8892/components/OssnComments/classes/OssnComments.php