It worked for me in UK on a recent order. When I selected Paypal as the payment option and it took me to the Paypal website, I was able to select Paypal Credit from the various payment options I have set up in Paypal. 

However, Paypal wasn’t available as a payment option on the Sonos ordering system for the new products that were on Pre-Order or Back-Order status. It looks like in UK at least, Paypal is only available on items that are available from stock.