No sound in Steam (new gaming laptop with GPU)

Does this manifest for 32-bit Steam games only? 64-bit games as well? Speculating here, but based on various discussions I’ve read I wonder if this is an SDL2 issue at play?
Does the SDL_AUDIODRIVER environment needs to be set explicitly perhaps? Check as user with…

echo $SDL_AUDIODRIVER

It can be set as per the following reference:

Sharing similar discussions that turned up from a quick search: