@Offender 

Here is what was found with respect to WDS and Tether.

Network topology

Archer C2300 <-----> C7 (WDS)

                        <----> C8 (WDS)

1. When the phone is connected to the C2300s network, the Tether app would detect the C2300 and C7 only.

2. When the phone is connected to the C7, the Tether app would detect the C2300 and C7 only.

3. When the phone is connected to the C8, the Tether app would detect the C2300, C7, and C8

Only when the phone is connected to the C8 would everything be shown. It is likely caused by the detection method for the Tether app as the Archer C8 is different the the new detedtion methods used on the Archer C2300 and C7. This also applies to newer models as well.