My intuition based on previous Facebook-based business is that depending on anything by Meta makes for a very risky proposition - it might be doing great at any one moment and be completely shut down or just made non-viable the next.
If Apple's headset looks anything like their phones, it will probably be the more fragile platform to depend on.
Or to the thousands of Mac developers who sideload their app without the App Store.
Or to the tens of thousands of Windows developers who distribute apps through freestanding MSI and EXE files...