There are many natural products which have a similar magic. Cork, sheep wool, bees wax, &c. And yes most alternative leathers are plastic with 10% of something

There are many natural products which have a similar magic. Cork, sheep wool, bees wax, &c. And yes most alternative leathers are plastic with 10% of something in top so you can call it "apple" leather, "pine apple" leather, ... Or straight up petrol derivates