I don't have anything for this season, but Bradley Beal had the fewest points per game with 30.0+ points per game in 2020-21, with 31.3 per game.

who is the shortest player to average 30 points per game
Interpreted as:
Who is the shortest player to average 30 or higher points per game this regular season?
2020-21Beal2020-21Curry31.332.0
NAMESEASONTMGPPPGMPGRPGAPGSPGBPGTPGFGMFGAFG%3PM3PA3P%FTMFTAFT%MINPTSREBASTSTLBLKTOVPF+/-
Bradley BealBradley Beal2020-21WASWAS6031.335.84.74.41.20.43.111.223.048.52.26.234.96.87.788.92,1471,8782832656922187140-3
Stephen CurryStephen Curry2020-21GSWGSW6332.034.25.55.81.20.13.410.421.748.25.312.742.15.76.391.62,1522,015345363778213119+242