I don’t think backups were used, likely all comments are just soft deleted and versioned. So I think they just toggled off soft deleted comments, and reverted

I don’t think backups were used, likely all comments are just soft deleted and versioned. So I think they just toggled off soft deleted comments, and reverted to older comment versions. That might show up as comments missing their added “edit:”s. Another commenter here said they think this was an accident, I’m inclined to agree