[No Foul] An attacking player falls while trying to go past the goalkeeper in the penalty area

In a high-stakes moment inside the penalty area, the referee judged the incident from a good position. This was a good decision. The question in this scene is whether the Omiya goalkeeper stopped Sendai's No. 8, who was dribbling past, by making contact. Looking closely at the footage, Sendai's No. 8 also appears to go down before making contact with the goalkeeper. The referee had an excellent position to see the incident clearly, and appears to have recognised that the player went down on their own, as if trying to win a foul, and so judged it as no foul. What do you think? Was there an offence that should have led to a penalty kick, or was the referee right to judge that there was no contact and no foul?