connecting an external mic to an iPhone 11
The suggestion to simply connect the microphone while you are recording a video worked. Many thanks to the person who recommended this "wierd" idea. Unfortunately, yes, Apple does not allow a normal connection for something that in today's world (of using a microphone to improve the sound quality of your communication with others over the iPhone) and (worse) does not even admit this shortcoming. For an iPhone 11 this works: simply start recording a video with your phone and while recording plug in the toggle (Lighting) and continue to speak. The video recording than includes audio through your external microphone.
iPhone 11, iOS 13