A Microsoft product doesn't mean the full capacity of the company will be devoted to resolve it. In a big company almost all products have to fight very hard for additional resources, they are not given resources just because the company as a whole made tons of profits.

Microsoft is pretty hands off when it comes to their acquisitions the last decade.

And moreso, this is GitHub's product (they acquired it, not the larger MS org), the GitHub group is still fairly independent of Microsoft. I can imagine GitHub doesn't give a shit as they continue to push people to use the GitHub package registry instead.