As I've embraced indie post types, such as reposts, I've noticed that actually I've been using them wrong. Looking at https://indieweb.org/bookmark#Repost it appears I've been conflating a "retweet" on Twitter with a "repost", thinking they were the same. Alas, they are not, and it makes more sense to be a bookmark. I've since updated the posts using the wrong type and will get things right next time!
The new option is available starting today on iOS, Android, and mobile browsers.
Perhaps he’s unaware of it, but this sounds a lot like the design decisions that micro.blog has made in it’s platform which is very similar to DoOO, but for the broader public.