I can start a general info thread for 2021 U.S. Nationals in the Kiss & Cry section but most of the links already are posted in this thread. ETA (I misread your question earlier): No subforums have been created in the Kiss & Cry for individual Nationals this year (such as Russia).
There is subfolder for Canadian Challenge, which overlaps with US Nationals. There was also a subfolder for Japanese Nationals.
It would help to if some of the links were copied over to KnC. For example, the practice groups is no longer available. Maybe it will be available later, as well as a link to the results.