@skyfaller asks:
"At a minimum your helmet should be certified to the Dutch NTA 8776 standard, the only one specifically for ebikes."
https://helmets.org/helmets-for-ebikes/
Virginia Tech rates helmets, and you can filter for "e-bike (NTA)" helmets, but there are 13 helmets with 5 stars (too many), and the highest-rated options are very expensive and bulky. And can I even source them in the USA?
https://www.helmet.beam.vt.edu/bicycle-helmet-ratings.html
Q7. What is the best/safest e-bike helmet?