It won't! That's the most galling aspect of this gigantic waste of money. That you're calling it a "new market" is precisely the problem --- when you've sunk this many billions into something, you can't wait that long before needing to make that money back.
The "metaverse" is ironically set up to be Facebook's walled garden. It has no other use, it cannot be repurposed or made modular in any way. It's not a standalone product that say, integrates with Google Ads, something that they could try to offload to some other company.
It's Zuck's baby, and in the middle of slow and protracted crib death.