It's easy to use the Audio Mix tool in the Photos app with videos recorded with Spatial Audio on your iPhone. The results may not always be perfect, but it usually gets the job done.
Note : You will get better results on the iPhone 16 Pro models as they have 4 studio-quality microphones with lower noise ratio.
This feature is most useful when you're vlogging and want to quickly trim out background noise before sharing it to social media. Thanks to Audio Mix and other editing tools in Apple Photos, you no longer have to rely as much on third-party video editing apps.
Yes, there are still video editing features that users would like to see in the Photos app, but at least it offers some basic, easy-to-use tools for quick edits. After all, not everyone wants to dig into a full-fledged editor when they want to post a video to Instagram, YouTube, or TikTok.