Will OCLP work on an already patched Catalina install (from Dosdude1) or do I have to downgrade it to El Capitan. [Macbook Pro mid-2009 5,5]?

So I got a bricked Macbook pro 2009 from one of my relatives and I somehow managed to installed Snow leopard on it, and got it up to Catalina using Dosdude1. Now I want to get up to at least Big sur. Is it possible for OCLP to work on a patched OS?