No, they never changed anything.
You can change the divisions yourself when you start a franchise. Just put all Canadian teams into the Central division to become the North and realign the rest on your own. The schedule will change a little, but you'll still play teams from across the league so you can't have the exact schedule of this past season.
At the end of the day, the season is now history (hopefully gone forever and we never have to go through that again) and I'm not sure why you would want to go back. Personally, I didn't bother much with franchise mode in NHL 21 because the Kraken are not in the game so it sucks long term to be playing without them.