I have iphone6 and my Instagram is not working due to update issue what should I do now?

I have an iphone 7. I can post a story or reel to Instagram but I can’t post a “post”. The problem started a few months ago. I’ve reinstalled the app, checked the settings etc. Still

not able to post. Is iPhone 7 to old for Instagram?

The iPhone 6 cannot meet the requirements of the Instagram app. The non-technical reason......the iPhone 6 is too old.

You will need an iPhone 7 or higher if you wan to use Instagram.