Yeah and no. I guess if you call anything that's long chains of Carbonhydroxyd chains a plastic yes. But taking wood as the basis material instead of fossil oil is a difference
Edit: well if you think just a little more than I did right there: the epoxy is of course also a plastic.
No, it's literally filled with plastic, regular ass ball cancer plastic. They're using the same method Nile red does. Just using the processed cellulose as a scaffold for epoxy. DNSE and MMA for optical wood, PEG and MMA for thermal wood.