Finally got the crown. Needed 1 more match on top of the 7 unique pieces (looked at the code after getting all 7 & topping out to a loss )
Thanks for the code share. YouTuber CaryKH recently coded ScrabbleTetris https://htwins.net/scrabbletetris/ and it's fun to compare your implementations (his is less official in terms of rotation and kick) Crowned again for good measure.