Microphone only records my voice

I am trying to record sound effects, but only my voice is being picked up through my microphone. How do I disable noise and sounds being automatically muted?

I am using Windows 11.

That’s confusing…

The microphone will pick-up all soundwaves hitting it.

Are the sound effects acoustic soundwaves in the room? Or are they playing on your computer? Something else?

I am trying to record sound effects

Digital sound effects, right? Not you ripping actual paper to get the sound of ripping paper?

Audacity will only record from one thing. It will not record your microphone and a digital library you downloaded. There are settings where you can make the computer record everything from all devices, but you can get stuck recording keyboard, delete, copy, and user operating sounds, too.