Hi Asti,
These customisations have been in place for months, so it makes no sense that they have now disappeared.
What I mean is that from one day to the next, classes corresponding to functions such as "view replies" or the comment button itself have disappeared. If you try to look in the inspector for the "wpd-view-replies" class, which is responsible for displaying replies to comments, you will see that it is not there, it has disappeared. And the same goes for the comment button.
As I said, this css has been used for months, so it doesn't make sense that it's just gone. Something's happened, but I don't know the cause.
P.S.: Also, I'm trying to recover it with backups, but nothing works. Which data tables should I recover from previous backups? To make sure I'm not doing it incorrectly