ehh group activities aren't as fruitful as they used to be, but they are an older group so that's kind of inevitable. We've gotten lots of solo activities, and they are expected to have a comeback soon this year.
Though honestly, I don't think Wheein being in a different agency or them being an older group is what's stopping them perse. RBW has been shitty for years, and they really could've done so much more for Mamamoo in general. Like, they could've toured for example, but RBW decided against. From what I remember, some of the shitty promotion and odd decisions comes from them "not wanting to be known as the Mamamoo company". Nevermind the fact that Mamamoo built their company, and you'd think they'd be more conscientious and promote their most popular group, but I digress
Oh it really sounds like rbw doesn't treat them well. That's a shame. They're very talented