No, there are good reasons for it. A lot of people get confused between SUSE and openSUSE offerings. Often SUSE customers show up in openSUSE places, because they believe that it’s a place they can get official support. And I’m sure a lot of potential customers might get confused in the same way too.
On the flip side there are also a lot of openSUSE (adjacent) users who think SUSE is (secretly or not) making openSUSE development decisions or think they can dand SUSE to do that and that.
So there are some good reasons to consider a rebranding, but also some speaking against it, like the less of recognition it might entail.
Mobian developed for PostmarketOS? I feel like you are mixing something up here, as those are both distros. Maybe you mean Phosh?