If audio is not playing on your Raspberry Pi and the only output recognised in settings is ‘dummy output’ then you have a problem. However, this issue is easy to solve, all you have to do is add two lines to config.txt.
For Christmas I got a Raspberry Pi 4. I had to order a thermal cooling case as well as a USB-C power lead as well as a microHDMI to HDMI adapter (first one didn’t work, second one did luckily). I got the 4GB version so expect some great performance.