I don't think they're averse, especially with regards to MMOs, but I think their focus on acquisitions is Game Pass. We don't see MS going after mobile game dev studios or heavily investing in their own mobile game divisions. Square Enix has a much higher market cap than other publishers with comparable AAA output and success in large part because of their mobile games output and because of FFXIV, which has a business model that doesn't make a ton of sense on Game Pass. So they're much more expensive for stuff MS doesn't necessarily care as much about.I don't think MS is averse to MMOs or mobile gaming. Like at all. With Bethesda they got 2 MMOs and even a mobile studio. They also tried some mobile games too (though the flopped). There is a lot of money can be made on mobile.
I also think if Square Enix wants to sell, it'll probably be to Sony and not MS anyway. I really don't see MS ending up with them.