Add additional play 1s to theatre set up

Hi,

I have a playbar, sub. And Ls & Rs surround play 1s. On my current system set up. 
 

I know you can’t add speakers to get 5.1 or 7.1 surround but is there a way of adding 2 more play 1s to extend or duplicate the sound of the surround speakers? 
 

We have an odd L shape lounge and I wanted to enhance the audio for both areas.