Helldivers Objective - Call Shuttle and Extract (Cyborgs)
4After all other objectives are either completed or failed, you make your way to where the Call Shuttle beacon has dropped, call it in, wait for 1 minute and 30 seconds, and then try to board with full team.
If for any reason, the full team will not be able to board, it is often better to just let it go (no one board) and then just Call Shuttle again and repeat the attempt. You only fail the Extraction Mission Star if someone boards while someone else is not able to board.
If you have LIFT-850 Jump Pack equipped, you can opt to jump on top of the Shuttle (right distance & angle with timing just before it lands). Once up there you can call in Reinforce, drop stratagems, and use weapons that arc downwards (like Obliterator, Rumbler, Demolishers, and Grenades). To get in Shuttle you need to just walk down the wing on either side and straight into the open door.
If you have Smoke Grenades equipped, you can try using those near the doors to ensure new enemies won't spawn blocking the door, but this doesn't prevent other enemies already on the field from moving in the way.
This video shows extraction from all 3 missions from same Hell Dive Snow Planet vs Cyborgs.