At least on Peacock, NBCs streaming platform that claims it has all streams that are being broadcast in the US, there was only the main NBC feed. They do show world feeds during the day of various sports but usually opening and closing ceremonies we are stuck with the truly terrible broadcasts NBC puts together.
As a USAian I would be grateful if someone could provide a link to this section of the ceremony because it looks really cool but the split audio makes it tough to watch with my wife (and I don’t really need to see the shit NBC coverage in the corner).