I have a silly nonsensical theory on why certain titles aren't available.
Generally, many VR titles involve more hassle to obtain, and typically involve payment subscription websites to download them. Why is NON VR titles easier to get? Because they've calculated that people who own VR equipment generally have money.
So the same business model/strategy applies for the typical NON vr title such as ENKI-080 that is super late in its availability.
It's intentionally unavailable, because even poor people have some disposable income. A rare unavailable title such as ENKI-080 happening in an infrequent manner, will be tolerated and some people will pay.
Either that or some dude dropped the ball, lol.