22 1R+1A Top Two but the flush got there

[mwalsh2020]

Villain is unknown. No reads. My friend played this hand but doesn't really ever go on 2p2 so I figured I would at least try to learn something from the hand. How often is this ever a lower two pair? Can this ever be a bluff? Comments on flop/turn play also appreciated.

*** HOLE CARDS *** Hicksd has AJo
mario lira: folds
Jogarcia: folds
Hicksd: raises 150 to 250
russ3074: folds
Gui78: folds
wolf22222: folds
camata is connected
JJ3man: calls 200
LaJune: folds
*** FLOP *** [Ac 5h 2c]
JJ3man: checks
Hicksd: checks
*** TURN *** [Ac 5h 2c] [Jc]
JJ3man: bets 300
Hicksd: raises 400 to 700
JJ3man: raises 600 to 1300
Hicksd: calls 600
*** RIVER *** [Ac 5h 2c Jc] [7h]
JJ3man: bets 1500
Hicksd: ???