Where can I buy a metaverse index?

I'm curious, could you please elaborate on where exactly I can acquire a metaverse index? I've been hearing a lot about this concept and its potential in the crypto space, but I'm not quite sure where to start looking. Is there a specific exchange or platform that specializes in offering such indexes? Additionally, are there any requirements or restrictions I should be aware of before making such a purchase? Your guidance would be greatly appreciated.