Could you provide a reference for your claim that the OrangePi Plus 2E has a fully libre stack? I was under the impression that it used out-of-tree kernel patch

Could you provide a reference for your claim that the OrangePi Plus 2E has a fully libre stack? I was under the impression that it used out-of-tree kernel patches and binary blobs, which Wikipedia confirms. I'm looking for any such (fully libre, no blobs, not even in firmware) hardware, but I haven't found anything so far except for some heavily modified old Thinkpads running Libreboot (sold by a vendor with shit customer support, as in delivering months late and not communicating for weeks at a time).