I don't think so. While you can artificially stimulate the vestibular system, getting that to work precisely across all the users of the headset would be rather tricky.

But the even bigger issue is that even if you overcome that, you still have the fundamental problem that a correct vestibular response is extremely important to keep users from falling over. If you artificially give people the impression that they are accelerating or decelerating, they'll automatically compensate and lean into it and just fall over. This happens already often enough just from the visual stimulus alone, if you mess with the vestibular system those accidents would get a lot worse.

That said, maybe there is some middle ground that could work where you don't create a real virtual vestibular input, but just a little jolt to notify the brain that something is going in, even if that something isn't matching the visuals. Many people report having less issue with motion sickness when they walk in place or bob their head. PlaystationVR2 has a small rumble motor build into the headsets with is supposed to help a little bit here as well.

If you ever go near a high field magnet, they cause balance disturbances, so you can stimulate the system.

However I’m not sure that putting 3T magnets near people isn’t an option.

There’s a very high overlap between VR sickness and normal motion/car sickness. That is also unsolved but with a much larger user base!