ALL of my 2024 test-normal use PCs connect to a TV as its monitor. In corporates, in my past life, monitors that were DP connects have speakers, too. Today's monitors have speakers along with the TVs that many are using today. Thus in these layouts, booting systems connected to these monitors have audio ABILITY but not active.
In my case, as maybe the case with many, external speakers are not connected/needed. This being the case, FDs boot to desktop without active audio ability. This requires unfamiliar users to HUNT for what is wrong and how to resolve without giving up on Fatdogs.
Solution?
In the picture below, its apparent that the OS knows that HDMI is present. In the future, could FD development consider on pristine boots to activate audio on the existing HDMI path ... knowing that there is audio capability there?
This may be much more difficult that it appears OR this fact of presence may just be an oversight in builds.