I'm inclined to lean towards reconfigurations of simple materials ...

This is just a reconfiguration of soy protein isolate. They dispersed it in an acetic acid solution, applied heat and used an ultrasonic homogenizer, then used glycerol as a plasticizer and dried it out. I was expecting something more exotic, but this doesn't seem difficult to scale.

https://www.nature.com/articles/s41467-021-23813-6