I think Miyeon didn't want to seem like she's mentioning other idols for clout when she was smaller, but now that she's rising as a potential 4th Gen IT girl, she's comfortable & secure opening up her friendship with International IT girl.
Yeah that's what I mean. Years ago she wasn't even looking at them on award shows but now she's been calling Lisa out lmao.
I think maybe she wanted to keep it quiet until G-Idle was at a certain level. Netziens can be very weird about stuff. She probably wanted to keep her distance until that "Did you know she was kicked out of YG for - " stuff couldn't come back again if she was associated with a BP member.
Or maybe they reconnected recently, which would be nice too.