I don’t know. The blood spatter is downward across the cheek and downward still to Trump’s lip. If the shot came from the front, it would have to come from below and travel upward toward Trump’s ear. On the same BBC broadcast I mentioned, they located the person who died in the stands perpendicular to and to Trump’s left, suggesting that the shot came from Trump’s right.
Not if the SS shoved his head downward, the blood flow which had just started and wasn’t rushing would have flowed down due to gravity and that’s what it looked to me like happened.