All hero statistics from competitive modes since Overwatch 2 have been as season 3 started merged in a combined statistic for all these seasons together and it is impossible to view them for seasons separately.
Additionally, although this is a known error, Weakly mission ROLE MASTERY is stuck at 1 victory per each role, despite me having at least 6 wins on tank for example. I’m not yet sure if it’s the display or entire achievement but an error nonetheless.