https://support.sonos.com/en-us/article/connect-sonos-to-a-new-router-or-wi-fi-network

Specifically: 

Switch to a wired setup

When wired to a router, some Sonos products can broadcast their own dedicated wireless network that other Sonos products can use.

If you have Sonos products that support this, you can temporarily use your Sonos system in a wired setup as a workaround. You can find instructions on how to switch to a wired setup, as well as a list of products that don’t support this type of setup, in this article.

Thanks but didn’t need to do this. Speakers now connected. The Sonos instructions need to be updated to inform owners that the speaker reset button needs to be held for over 1 minute before it is ready for connection via the App.

The button(s) are just held until the LED flashes orange and white:

https://support.sonos.com/en-us/article/reset-your-sonos-product

I’ve never had to hold it button(s) for a minute. But maybe there was something else going on with your speakers that the buttons needed to be held that long.