Create MEsh with Orbi 850 and WAX610Y

Is it possible to extend the mesh network created by an Orbi 850 (+ two satellites) with a WAY610Y external access point? If it is not possible to include it in the mesh, can I just plug the WAY610Y into an ethernet port on one of the router/satellites and configure the SSID the same as the mesh network's (this may not give me access to the backhaul channels on the mess network but would be somewhat seamless to a end user roaming in the network).

If not, how would I create a meshed network of access points (both internal and external), some of which also need wired Ethernet ports using Netgear Products? I would like them to have embedded controllers so they do not require a cloud based management service. 

Thanks