Ipad pro m4 not using headphone mic

Version 18.3.2

I recently switched from Ipad air to Ipad pro couple months ago and realized that on my ipad pro, its using internal mic instead of headphone mic. On Air, it was using headphone mic. So I tested on apps, on voice memo it uses headphone mic but if I were to record video from camera app then it switches automatically to internal mic. Microphone is allowed to all apps. Same happens in pubg game and cod as well. Is there a way to set this to external?