Doesn't change the fact that when you try to find out "how do I record desktop audio on my Mac?", the answer is very often "use Audio Hijack", because macOS has no built-in way to record desktop audio. (Not even QuickTime's screen recorder can record desktop audio, only microphones! It's wild.)
These days, OBS is probably a decent alternative, but it's very video focused and very streaming focused, so it's not exactly great for that purpose.