If I am missing an event from some other unknown relay, is there any website or such where I can plug in the event ID and find it?
Discussion
Not to my knowledge... I've read some stuff about having relays update each other but it's a work in progress.
Meanwhile, nostr.wine (a paid relay) are running a filter that can broadcast your notes to the biggest relays and pull data for you from most public relays which addresses your concern.
https://github.com/nostr-wine/filter-relay/blob/main/README.md
