They didn't. Apple contributed the core logic to the Wi-Fi Alliance to build Wi-Fi Aware, which they now also support.
Kind of. When I looked, they added the api for devs to use on iOS, but it isn’t on macOS yet, and nothing uses it as far as I could see.
It’s a future promising tech though. A much better version of Wi-Fi Direct.
So, should there be apps that use it to transfer files between iOS, Android, Windows, and Mac without requiring them to be on the same network?
Interestingly, it still took the EU to force them to actually adopt it (and open it up for apps to use) in iOS 26.