There's more to development than just code. I'm sure the Godot developers value the contribution and will try to make the most of it, but they got zero input into how to implement it and this PR contains a lot of issues (e.g. it does some API breaking changes that can't just be done as-is.) On top of that, they have no idea (from the outset, I mean: obviously they are communicating now) if Apple intends to continue maintaining this code in the long run or if they just want to put the minimum amount of effort into shipping it and then consider that box checked, shifting the maintenance burden to volunteers. I don't think there needs to be intentional malice, even very nice gestures can work out poorly; we almost lost the Linux NTFS3 driver because Paragon initially stopped maintaining it and nobody else stepped up.

I think Apple can do good here but they should definitely communicate better. For open source, early and often is a good idea. (Though also good to follow through... I have been guilty of many licked cookies purely by accident and poor focus.)