The simplest way to setup your new router is to use the same SSID and password. All your devices will connect without issue.

I suggest you power down (unplug) all Sonos devices before removing your old router. Once your new router is setup with same SSID and password plug in your Sonos one by one and let each comeback. Open the app and you should see all your Sonos.

You can also follow the official Sonos setup here for a new router ( if that makes you feel more confident).

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

It’s important that you power down EVERYTHING on your network after replacing a router. Otherwise there is a risk of duplicate or unknown IP addresses if the units continue to use their old IP address. The new router has no knowledge of the old addresses and might unwittingly give out a duplicate. After a period (typically 24 hours) the IP client goes back to the router and “renews” its IP address. Sometimes this renewal fixes a duplicate, sometimes not. After a few days of renewals, the situation may resolve — leaving the human very confused.