Here's what I can remember:
-It's on ao3
-It's a hurt!Tony fic. I can't remember if it was emotional or physical or a mix of the two.
-It's post-civil war
-Redwing (Falcon's little bud) leaves Wakanda and goes back to Tony in the US
-I'm not sure what happens at the end, but somehow Tony can hear his creations. They all have their own names for him, but I can't remember them all. I at least know FRIDAY calls him 'boss', DUM-E calls him 'creator' or 'creator-unit' and Redwing calls him 'papa'.
Things I'm not sure were part of the fic, but might've been:
-Laura Barton is involved
-Tony dies (by his own hand or natural causes) in the end
-Tony was in a wheelchair (but I may be mixing this up with something else, so take this with a grain of salt)
-It's a gen fic
It's been found!
(Iron Is A) Star Killer by RayShippouUchiha