Yes it would be lovely to have Dex go directly to the watch, unfortunately this is still vaporware with the Apple Watch.
Welcome to our community! Thanks for posting. It seems your daughter is very active, my son uses an un-tethered approach with his pump to allow him to disconnect from his pump for long periods of time. Feel free to introduce yourself here:
It helps the broader community get to know you. Hope you keep posting, your daughters sports sound like they will present a unique and interesting challenge to manage.