fdaa is fly’s reserved starting block, so that’s how you would tell which is private and which isn’t. But yea, adding private v6 to the label wouldn’t hurt.
Yeah, my screenshot makes it a bit obvious. But when you don’t know and you are trying to configure 2 apps the same way (each with a private ip6), it’s not clear that one is private and the other is not (since there isn’t this side-by-side), which can be a security problem and also may make flycast ips not work.