The public can absolutely participate in this by way of syndication deals. Those syndicates are what's covering up the true extent of ownership and they're essentially charging for access with their fees. It's oddly shady, poorly regulated, and more expensive than just being public, but everyone can ride this ride.
The general public absolutely cannot. You have to be an accredited investor or qualified purchaser; you need to have access; you have to pay carry & fees (maybe multiple, stacked middlemen).