I don’t know why it would matter. FYI I don’t think I would bring this up with your (likely) coach, but I would be honest if asked.
Number depends on how confident you are about the ED. I probably wouldn’t do a lot of essays for other schools unless I had a reason to be hesitant about the ED.
On that topic, if you haven’t yet I would ask the coach just how solid the ED is. That answer can range from “you get a solid bump and are 50/50” to “I have never had a kid not accepted that I asked to ED”. Normally I let my kid handle coach communication, but for scholarship information and admissions information I asked for clarification, even if he was confident he had the right information. At the school he ended up at, he actually got a very early offer that I didn’t expect. I kept asking the coach in slightly different ways if he really had an offer and how solid it was. By the end the coach was laughing. We had a similar conversation later about how safe he was in ED. Ultimately he felt safe enough he didn’t do any other apps, although I wouldn’t necessarily recommend going that route.