**The post that I was referred to as an "answer" does not answer this, so I am reposting.
So idk when this started, but I just noticed that my audio was coming from the computer and not the speakers. I've tested and cleaned everything. The speakers work, everything works as it should if I plug it into my MacBook so it's not that. I plugged headphones in, and still nothing. Even when they're plugged in, the audio continues to come through the imac speakers. Wiggling it around does nothing. Not even a hint of audio.
Headphones don't show up as an output option in audio settings. Not sure they ever did.
All audio settings are good. I did the coreaudiod quit process and everything else I've seen. It makes no sense and it's a major problem for me atm.
in Activity Monitor, when searching headphones" This shows up but i dont know what it is. HeadphoneSettingsExtension (system Settings) (620) Screenshot attached.