I don’t think Godot has any built-in function to support this procedure for now.
But you could use: OS.shell_open("mailto:your@email")
This is a simple url request, but ‘mailto:’ url makes the default browser open a Email manager if one exists in the local machine, however is being less supported lately.
For feedback, you could make a site with a page that has this functionality, say, a “Sugestions” page, and then on your game put a button that triggers OS.shell_open("http://yoursite.com/suggestions.html"). But for automatized data collection without relying on an non-Godot external server, I don’t know.