I uploaded the Beta firmware to my Shadow device. And prior to upgrade it warned me that this is a 3rd party firmware/unofficial…
This is what I downloaded:
Date Compiled: 2023-07-20 00:43:22 (UTC-04:00)
SHA256: 6f34a9d5139a5b4a7f9b942cb0fa01071bfd596e345bdba591b84a755289db91
from here: GL.iNet download center