Thor: Ragnarok ends with the remaining people of Asgard aboard a refugee ship that meets Thanos' ship. Avengers: Infinity War opens with
Thanos and his minions having commandeered the ship and several bodies can be seen on the floor.
This begs the question, what happened to these characters:
Korg
Miek
Asguardian extra #3
Valkyrie
This has been confirmed upon in Avengers: Endgame, in short the Asgardians, presumably half of them, escaped to Earth and created "New Asgard". Of the half of the Asgardians that survived the named characters we see are:
1. Valkyrie, essentially appears to be leading the people whilst Thor drinks himself away in "isolation". At the end of the film she is made Queen of Asgard by Thor for her natural leadership.
2. Korg, appears to be living with Thor playing Fortnite and generally not doing much.
3. Miek, again appears to be living with Thor and probably doing even less.
From this article referencing this Reddit post (emphasis mine):
According to the Redditor, Russo confirmed Valkyrie did survive Thanos’ ambush. The director did not say how, but he did say a portion of the Asgardians also survived. Russo said escape pods ferried those survivors away from the battle, giving the Asgardian race the chance to escape extinction. It is very possible the Valkyrie was charged with overseeing that evacuation since most of the Asgardian refugees were simple civilians.
And, if you are curious about Korg, then prepare to be a bit let down. The Redditor said they asked Russo whether the fan-favorite character made it out of the ambush alive. The director said he wasn’t “willing” to reveal Korg’s fate just yet, so fans will have to keep their fingers crossed for the hero a little while longer.
Long story short:
At one point during Avengers: Infinity War, Thor says that half of his people are dead (which makes sense since that's Thanos' whole m/o).
Thor: Thanos already has the Power Stone because he stole it last week, when he decimated Xandar. He stole the Space Stone from me when he destroyed my ship and slaughtered half my people. The Time and Mind Stones are safe on Earth. They're with the Avengers.
Avengers: Infinity War
However, the only people that we see die/dead are Loki and Heimdall.
It is unknown at this point the fate of any other specific Asguardians.
Valkyrie survived both Thanos' attack on the Asgardian ship as well as his "Snap", according to the actor who portrayed her, Tessa Thompson.
Q. Did Valkyrie disintegrate?
A. No, she’s in one piece and THRIVING
Via Twitter: Edited for legibility
At the beginning of Avengers: Infinity War, we see the Asgardian's refugee ship filled with
the bodies of the survivors of Thor: Ragnarok. The children of Thanos can be seen going around stabbing the bodies, implying that not all of them have died. Thor, Loki, Hulk, and Heimdall all are still alive, but are incapacitated to some extent (Heimdall in particular is lying wounded on the floor). It's clear that the attack on the refugee ship by Thanos has left nearly everyone who stood in his way dead or incapacitated.
Further on we see the refugee ship completely destroyed, leaving Thor floating in space to be rescued later by the Guardians of the Galaxy. When Thor is finally rescued, he makes no plea to his rescuers to search the area for survivors. Therefor, Thor must either not care for the others aboard the ship or must have known he was the only one who could have survived the destruction of the ship and the subsequent float through the vacuum of space.
So to answer your question:
The Asgardians aboard the ship are dead. Korg and Miek are most likely dead too, unless they left the ship through some other means before the attack.
