You are still acting like there’s some change that Biden could make fix this. He can’t. This is a diplomatic apology, not a personal one. He’s saying “I’m sorry, this is the best America can do.” That’s an apology, whether you think it is or not. If it wasn’t, then countries would rarely ever apologize for things they can’t fix.
You’re also assuming that Zelenskyy doesn’t understand this, or would be insulted by this. You call it “useless”. As the leader of another democratic nation, Zelenskyy understands it very well and most likely receives it in the way it was intended.
Your comment is just wrong, and I expect an apology illustrating how you will change your ways.