Better Azalea has been discontinued as the mod was integrated into one by the same author—Ecologics. It follows that support for the wood types should continue with Ecologics rather than a discontinued mod.

There is also a Fabric version of Ecologics that merged with Better Azalea, if you feel like porting these changes to Fabric too.

Ecologics (Forge only) support was added in 45505e8 and Better Azalea support was removed, thanks for letting me know about the change!