I can’t install dasher app

Okay, but what happens when you try to download Dasher?

Are you aware that Dasher now requires iOS version 14.1 or later?

What iOS version is now running on your iPhone 7? (check it in Settings>General>About>Software Version)

Have you tried to contact Dasher developer/support team and explain your problem, using these instructions:--> How to contact an app developer - Apple Support

On what iPhone model? With what iOS version? What happens when you try?