AR did just right - South Korean player was in an OSP, issue was who played (not deflected) the ball last. As a goal was scored, VAR was looking it over and sent it down for an OFR with Geiger. From there, he saw the toe poke of the German player actually playing the ball, saw it go between the legs of another German and to the South Korean, who put it in.
AR was right, though he couldn't see who last played the ball.
VAR was right as they sent it down for OFR
Ref made the right call based on seeing the German toe poke.
That's how I read it.
Thought Geiger had a very good match - good positions, good communications, good judgments. Only call that I can really see being widely discussed is the caution for simulation. There was contact, how much, did player embellish, etc.