edit: meant to comment on the post, not reply but that’s alright
https://www.amazon.com/Chalkovsky-Premium-Edible-Chalk-Impurities/dp/B08W9PXT88
" EXCLUSIVELY DESIGNED FOR PICA CRAVERS, ASMR LOVERS AND RECREATIONAL USE: These signature Belgorod chalk pieces are known for their crispy texture and unique flavor."
found that interesting