However, while Infinity War does pick up up right after the events at the end of Thor: Ragnarok and we get to see what happens to Thor, Loki and Heimdall, there’s no mention of either Korg or Valkyrie.
Those characters are very notable at this point, considering how well-liked Thor: Ragnarok was with fans and critics alike.
Since that didn’t happen, logic would dictate the two characters are still alive and kicking somewhere.
If either Valkyrie and Korg had died on the ship, I’d hope the movie would have at least honored those characters with a moment to shine, as happened with Heimdall and Loki.