I have a Wi-Fi extender upstairs & my Netgear router downstairs.

The Chromecast upstairs is too far from the Netgear to reliably hold a connection. So I have to connect it to the extender.

Right now, I'm unable to add that Chromecast to my speaker group, since it's on a "different network". Is there a way to configure my network settings to make Google home see the extender as the same network for the purpose of grouping my device?

~`~

I'm terrible at explaining things, so this alternate explanation may help:

I've got a Netgear router & a Wi-Fi extender that's connected to that signal. When I browse for Wi-Fi networks, I see Netgear 2.4G, Netgear 5G, & Extender.

Currently connected to Netgear 2.4G: -Chromecast Audio -Google Home -Google Mini

Currently connected to Extender: -Chromecast

I'm trying to put all these devices in one speaker group, but since the Chromecast is seen as being on a different network, it won't let me. Is there a way I can still do this?