Nintendo tells us how many titles sell 1 million or more units during their annual fiscal report. However, they don't tell us which ones they are unless they are published by Nintendo. For example in their March 31, 2020 report they said that 27 titles sold at least 1 million during that fiscal year, 18 Nintendo titles and 9 from other publishers. They only told us what the 18 Nintendo titles were though.
https://www.nintendo.co.jp/ir/pdf/2020/200507_3e.pdf
curl-6 bet me that PS5 + X|S sales would reach 56m before year end 2023 and he was right.
My Bet With curl-6
My Threads:
Master Thread, Game of the Year/Decade
Switch Will Be #1 All Time
Zelda Will Outsell Mario (Achieved)
How Much Will MH Rise sell?
My Bet With Metallox







