The short answer is no. It’s not common and no such audio extractor exists. Probably best to step back and ask what exactly you’re hoping to accomplish? Are you trying to se the Amp to power rear surround speakers? You don’t need a different device as Sonos handles this wireless. Are you wanting to have TV audio in a different room, using the Amp? Again, Sonos handles this wirelessly (audio in second room slightly delayed)
You might be able to use an HDMI matrix to send an HDMI source to two HDMI outputs. Send output to the TV, and then connect TV to the amp. For the other output, connect to an HD Fury Arcana then to the Sonos Arc. However, this is not the right way to accomplish any of the two common needs I mentioned already.