As far as I know, Facebook used to show this message "last time edited 00.00" (I don`t use FB) or something like that, showing the readers that the post was edited and the time of the last edition.
I think the user is asking is such kind of tools can be available in here
Last time i checked, edited posts can be viewed. You can view the time it was edited and the previous state before the edit.
OP, if you want to keep track of your edits, you can keep track of it in
Drafts, but it only lasts for 7 days.
Hmmm drafts, it could be the answer, but maybe if drafts of everyone could be publicly viewed?