Ring Fit Adventure has surpassed 1M in Japan despite all the shortages, the game sold 150k units through Nintendo's official store in Japan.
Still wondering how high it could have been, without all the problems in terms of supply. If there is supply the rest of the year - I won't be surprised if it easily surpasses 2M by the end of 2020.
Stock has been so limited that it could easily be a huge holiday title this year even though it'll be over a year old. If Nintendo is serious about advertising heavily to casuals in 2020, then Ring Fit Adventure, Animal Crossing and Mario Kart should be spearheading that campaign.