Next time you have practice get there early and have a pitching practice with your dd. Maybe he'll get there to see her pitch first hand or maybe it's a "subtle" reminder that hey my dd wants to pitch too. 2 birds with one stone pitching practice for your dd and a way of reminding him she wants to pitch w/out talking directly with him. He'll probably speak to you about it.
Very good strategy...it is always good for a coach to see a player working outside of their practice. I too think that 7 pitchers are too much. I would probably look for another team. Even if the coach pitches her some it will only be a few innings here or there and that is not enough time to develop. I would find a team where they have 2 bracket pitchers and they need a third and she can pitch the pool games to get experience and then get a few bracket innings as she develops. She needs to be with a coach that understands it takes time to develop and he has to find the opportunities for that. The other option is to pick-up with other teams that need pitching. That is what I did for a while since my DDs team at the time was not giving her many innings to develop. Good luck!