Hi jege41,
Yes … most of the foam manufacturers are making some version of bio polyfoam and memory foam that replaces a small percentage of the petrochemical polyols with plant based alternatives. You can read a bit more about them in post #2 here and there’s a good article about them here.
It’a a fairly mature technology that not so new any more although research continues into increasing the percentage of the polyol replacement without negatively affecting the foam (50% polyol replacement or so is about the highest currently)
Phoenix