System Information > Hardware is the place where you can check to see if your podcast mic is properly connected to your Mac. System Information is an app that shows detailed information about your Mac hardware, software, and network. You can access System Information from the Utilities folder in the Applications folder, or by choosing About This Mac from the Apple menu and clicking System Report. Under the Hardware section, you can find information about your audio devices, such as the manufacturer, model, and connection type. If your podcast mic is connected to your Mac, it should appear under the Audio section. If it does not appear, you may need to troubleshoot the connection or try a different port or cable12. References: = Apple - Support - Manuals, macOS User Guide, System Information; How do I connect a microphone to my MacBook? | ZDNET.

SharePlay is a feature that lets you share your screen, watch videos, listen to music, or work out together with others in a FaceTime call. You can use SharePlay to bring apps, webpages, and more into the conversation. To share your screen in a FaceTime call, you need to tap the Share Content button and then tap Share My Screen.
Everyone in the call can see what's on your screen until you stop sharing, but they can't control anything on your device. If you get any notifications while sharing your screen, others won't be able to see them.
SharePlay requires iOS or iPadOS 15.1 or later on your iPhone or iPad, or macOS Monterey or later on your Mac. References:
* Apple Device Support Exam Prep Guide, page 6
* Share your screen in FaceTime on your iPhone or iPad
* Share your screen in a FaceTime call on iPhone