1. Loki gives Earth golden apples so they can grow trees and every human lives longer, so Earth can take a proper place among the realms.
2. This one is harder. I don't remember plot details but I remember Loki went to Jotunheim (from Earth with Tony and maybe someone else) to help with something. I think there was some Jotun who knew who Loki is despite Loki keeping it a secret and he was liked there because he was trying to help. They were in a small village, I think? And fixing some machine maybe? My memory is fuzzy.
Actually I also accept all recs where Loki gets to deal with Jotnar xD