The mic is broken on my Pixel 6 and the Pixel camera resets to use the internal mic every time it starts, where Open Camera will save the setting to use an external mic. I may have had to tweak settings initially to get good quality but it's been fine for a long time. Black Magic would auto switch to external mic (as does Samsung, btw) but the video was absolute unusable garbage on Black Magic on the Pixel. I don't know if they've fixed it yet but there was something terribly wrong with it. All of that led me to using Open Camera by default.