Suppose an edit to one of your posts (be it question or answer) was suggested but rejected while you were not active. After reviewing the edit yourself, you think it actually would improve your post. Is there a way to accept such an edit retrospectively such that also the original edit-author gets credit for it (i.e., is shown left to the author as the person who did the last edit)?
No. Once an edit is rejected it's rejected for good. At this point you have two options. You can either:
- Make the edit yourself
This is probably what you'll end up doing most of the time although it gives no credit to the original user who suggested it.
- You can try to get a hold of the user in chat and ask them to resubmit the edit.
Of course, this will only work if the user has a chat account (has visited chat at least once) and has visited in the last three days. Otherwise the user won't get your ping.
Technically you could try to contact that user in a comment, but I don't recommend that for this situation.