Teachers on Finch, exchange friend codes with students? Yay or nay

This is such a different app that's not exactly "social media" so I was just curious. I (tutor) a 4th grade girl who is riddled with anxiety and I know Finch would benefit her. I have multiple students who have it because I hear the SOUNDS at recess LOL. I don't interact with students anywhere outside of my school email, but Finch has me curious. Any thoughts?