It’s not a delay, though. Players generally take these shots when they were getting ready to shoot anyway, but on a dead ball. Delay of game is called when you actively are preventing your opponent from getting the ball and going up the court.
I also wish Tatum didn’t turn his ankle, but let’s please not blame him for taking a harmless shot. You block the ball from under the hoop, you don’t sneak under a player taking a jump shot. It’s typical Heat dirty play and it’s their fault, not Tatum’s