CAt its core, a helmet must fit well - from padding that's soft and comfy, through no pressure points when shaking your head to avoid pressure points when changing directions.
Consider purchasing a helmet with a removable peak that can be easily adjusted as necessary, and one with a pinlock-compatible visor that's simple to remove and replace. https://michaelbrodiehelmetelover.blogspot.com/2024/10/the-5-best-adventure-bike-helmets-of.html