Yes.
The native camera App of a device vendor should (in theory) offer superior photo quality compared to OpenCamera, or certain options OpenCamera doesn’t have. Users tend to want to have the native App, even if only for comparison, Murena and Fairphone delivered.
There might be an issue with gallery integration currently, I don’t have an FP6 to verify … Fairphone camera app
I saw a post about mono sound in videos, too, I didn’t follow whether that got resolved … FP6 Photo App com.fps.camera Video is capturing sound only on left / mono