They used to have one but it was made obsolete by phones.

It will never come back. Sorry.

Just to clarify, Im not speaking of a remote control that has a touch screen and has to be charged daily. Im talking about a remote control that might take a couple of triple A batteries with fiscal buttons. Much like the company WIIM offers. 

Extremely unlikely to happen. As @edmountain suggests, there used to be one, Sonos figured out it couldn’t be both affordable and keep up with changes made to the speakers. Frankly, remote control hardware wasn’t their wheelhouse, the do much better with speakers. 

If you can live with 2 fewer preset/favorite buttons than WiiM, the IKEA Symfonisk remote for Sonos sounds like what you are looking for. 

I like where you are going , but the idea of another hub added to the router evokes a visceral response of..here we go again..Another piece of equipment to problem solve. In the world of low  power bluetooth and matter my guess is that the new amplifier from Sonos will have one…It’s a shame it has taken this long for them to realize that not everyone wants a phone to control everything in their life…We can have both..features of the app and physical buttons on a  remote control..They can live in harmony I promise. We have a hellicopter on Mars…

If you are a DIY, you could fashion a remote starting with a Raspberry Pi.

Early in the life of SONOS there was an avalanche of complaints that you had to purchase a SONOS controller and could not use a phone/pad. The feeling was that the phone/pad controller could be “free” because the phone/pad was already on hand.