This comes down to technique, experience and the use of a gimbal.
Placing the camera on a gimbal will smooth out and compensate for any vibrations caused by walking.
But a gimbal won’t do all the work for you, meaning your walking technique is very important.
While filming, i try to walk as evenly as possible, keeping a straight horizontal line in front of me.
It’s a trial-and-error process where you have to grow the experience over time.
It is an essential part of creating smooth virtual walks and also determines your style of videos.