Most kids hit the path by age one. Confirm your child holds their head up...

https://www.acid-bookmarks.win/wait-until-your-child-sits-up-steadily-with-solid-neck-control-typically

Most kids hit the path by age one. Confirm your child holds their head up strong while wearing a helmet. Pick front mounts for interaction, rear seats for stability, or trailers for naps. Your kid is ready when they sit up firmly on their own.