Hard foul at end of game

[LepTalBldgs]

In our girls varsity (small school) game last evening time was winding down with black up by about 15. White loses the ball out of bounds on their end line with about four seconds left. Black lines up a stack inbound play and white (inexplicably) lines up next to them. One black player makes a break for their basket at the other end of the floor with white several steps behind.

The inbounder lets the ball fly and black catches it just beyond half-court while their coach is screaming "Touchdown" (again, up 15). White catches up to black just as black is letting go of the layup and as the horn is sounding. I'm trail administering the throw in so I'm far away and haven't moved much as I'm still watching 8 players watch the play. Black ends up on the floor and the fans go crazy and it becomes obvious that white fouled her pretty hard, just based on the reaction of the bench and the fans.

Partner is right on the play with a strong whistle and an intentional foul signal. Time has expired and white goes to their bench while most of black goes to their injured player. Partner reports the foul and calls the game over.

I motion to black captain that I'd like a word and exhort her to speak to her teammates and encourage good sportsmanship in the post-game handshake, notwithstanding what just happened. (I'm getting to my point).

I've got no opinion because I truly did not see the foul, but in this situation, had you been the calling official and had the player fouled the other hard, knocking her to the floor, would you call a flagrant foul which dictates in our area that she miss the following game?

Post-game I told my partner that I didn't see the play at all but that I would have leaned toward calling a flagrant foul with the appropriate punishment. He said that he came up strong with the intentional signal but that he felt the game was over and that "it didn't really matter".