Thank you for the idea. You're right the button it's absolutely useless here. Please create the new feature request for idea about navigation
So we're in the right section. The idea is : remove the sharing icon in the "GPS average" function and add one when you select a feature (right next to the coordinates displayed).
When using the new GPS averaging function there is a share position button that allows to send the current position to Google Maps or Waze for example.
What is it for ?
I think this button would be more useful when clicking on a point to see its coordinates and attributes. It would allow for example to navigate to a point that we mapped using Google Maps