VR gaming is still on a developing state, and it still tries to penetrate the mass market. Even Nintendo has jumped to the VR gaming with their own VR Labo kit, which was released a while ago.
There's 2 factors that makes VR seems like "died" down nowadays:
-) It has a very high entry cost, especially on PC, since you need the VR headset and also a capable PC (which aren't cheap).
Sony & Nintendo tries to mitigate this by releasing a much cheaper VR headset, and it really pays of for Sony, since PSVR was the most popular VR out there.
-) It didn't have big games that could attract consumers to buying it. Imagine popular games like FIFA/CoD/Battlefield/GTA was released in full VR support, it has a high chance to sold like hotcakes in every platform.
Currently, big game devs & publishers only sees VR as a "complimentary", and not as their main focus. I hope that their stance would change in the next 5-10 years, and they starts creating AAA VR games.