I count GN Resound/Beltone as a single manufacturer. Of course Noahlink Wireless will work for this manufacturer because the it’s the same device (with different firmware) as GN Resound’s proprietary Airlink 2.
As for Sivantos CONNEXX Eight, it’s just the one hearing aid (the Pure 13BT).
Phonak Target 5.2 is not available yet. Seems like not much progress thus far. But the Target 5.2 news is encouraging.