Locomotion is a hard problem to solve, I can't find the source but a study in 2018 found that about 18% of people feel nauseous in VR. The headsets have improved significantly since then and there are many tricks a vr dev can use to make the VR experience less nauseating such as vignetting on move. There's a really good resource here https://locomotionvault.github.io/ that lists different approaches.

On a more comical note, some devs go out of their way to show that motion sickness isn't a problem for their game: https://www.reddit.com/r/OculusQuest/comments/lrj1dy/motion_...