Not directly no, as presumably your speakers have Bluetooth Receivers (RX), same as Sonos products and every other speaker. So you need to first output from the Sonos eco-system, over a line-out port (analog, or digital), to a Bluetooth Transmitter (TX), such as the 1Mii B03 Pro, or Fiio BTA 30 etc. (just as examples).

The Sonos product that supports line-out (analog and digital) audio to the Bluetooth TX is the Sonos Port. See this link…

https://www.sonos.com/en-us/shop/port

Note too, that such a Sonos Port/Bluetooth TX setup, is also handy for listening to all Sonos audio sources over Bluetooth Headphones aswell. That’s something I find handy when not wishing to disturb others in the home, or nearby neighbours.