This covers the cувєr Polygon issue, and the important part starts at 8:40: The exercise involves a simulated attack on the financial services & supply sector, and we've already seen attacks on Colonial Pipeline, and JBS this year, among others, which seem to reflect the targets of the cувєr Polygon exercise.
There are some powerful organizations involved such as ICANN, IBM, Deutche Bank, Euronews, Sberberg Group, as well as other companies such as NITEC (based in Kazakhstan), and Xalq Banki (based in Uzbekistan).
Skip to 8:40. Really, just skip to 8:40.