nighthawk rax45 trouble connecting to google speakers and bond hub

A couple things.

Turning off wifi doesn't turn off the routing features on the motorola. It causes a double nat. 

A double nat happens when you cascade more than 1 router.
https://kb.netgear.com/30186/What-is-Double-NAT
Fixes? There’s 3 options but only use 1.
1. Put the modem/gateway in modem only/pass through mode. This disables its routing functions.
2. Leave the modem/gateway in router mode but put the Netgears IP address into its DMZ. This forwards the data to the netgear. You can either leave the modem/gateway’s wireless enabled or disabled. Just make sure its using a different wifi channel to prevent interference
3. Put the Netgear into access point mode. This disables its routing functions. Wifi/ethernet still works but it does disable some features.
https://kb.netgear.com/26765/Which-features-are-disabled-on-my-NETGEAR-router-when-it-is-set-to-AP-Mode

also, make sure to be on the same 2.4ghz or 5ghz as the devices you're trying to setup. If the device only supports 2.4ghz, have the phone you're using for setup on 2.4ghz. 

Some older devices have issues with wpa3 and AX. You can try making sure to use wpa2 security. You can also disable AX on the 2.4ghz. 

either of these might help get them connected.