You're confusing your Quest 2 demographics for your Battle Royale demographics.
The games that have been trending and selling well in VR are similar to the games that are on Android TV's, mobile, and PC casual. These are the ones that don't buy COD or PUBG, mostly.
Now, could Fortnite on VR circumvent those demographics, and bring in the COD and APEX Legends bros? That's a tough one.
The Third Person Battle Royale games kind of lose a bit in VR, and people with toasters can run those games, including Fortnite. There's not much investment required, some of these types of games are free 2 play as well, giving a lot of accessibility.
In VR, there's no guarantee that a Fortnite or Apex in that style will still have the same appeal, and the headset changed from just looking at a screen. The cost of entry will also be much higher than the toaster they already have, which could be upgraded slightly for less than the price of nearly all players in the VR market, with higher access to high quality games and a larger number of games in general that are also easy to access. With a normal controller.
I think the companies behind those games know this and other risk factors, which may be why they have been very slow to do anything in VR. Most likely before we see a Fortnite, we are going to need to see more Among Us, Beat Sabers, and Super hots first, and likely more headsets selling over 3 million than just ONE who manages to sell more than 1 (and is at about 18 million now) before they jump in.
The other option is of course, to pay these devs and support a VR version to see if it works. But if someone where to have done so it would have been announced/out by now. All those devs also will likely have high asking prices to reduce or remove any risk if such a VR game should fail.