The 1.21.1 neoforge version requires the sodium dynamic lights mod, which is incompatible with lamb dynamic lights. This is probably a feature thats you're working on, and using lamb DL is probably more complex than sodium DL which is why the beta version requires the sodium version.
The 1.21.1 neoforge version requires the sodium dynamic lights mod, which is incompatible with lamb dynamic lights. This is probably a feature thats you're working on, and using lamb DL is probably more complex than sodium DL which is why the beta version requires the sodium version.