I think they’re Witcher potions. Based on her eyes, I’d guess she underwent the mutations.

I agree the “women cannot be witchers” thing always seemed sexist, but making her a witcher is a nerf more than anything. She didn’t teleport once in the teaser. A weird but welcome flip from ‘the female character didn’t earn it’ to ‘they took away everything she earned’ that we’re seeing in the social media reactions.