I know it’s probably too late to add this feature but I think a lot of users like me that relied on RIF and others would like to delete their history so it doesn’t add to Reddit’s content (not that I added much, but in principle).
I know there are other ways and I’ll try to find one but for a lot of people it would be easier to just do it through the app before it’s gone.
You may be able to delete your account, but that might not delete your post history.