The old RingCentral Softphone would mute (and pause) podcasts, Spotify, etc. when answering a call. There's an option to choose this here:
https://support.ringcentral.com.au/s/article/RingCentral-Phone-Desktop-Reduce-Mute-Other-Sounds-Windows-During-Call
But it got dropped out of the new release of the "RingCentral app".