Greetings kiel1030,
We understand that you are not seeing two apps on your child's Apple Watch, and we'd like to help. As outlined in the related article above your post, "The following features and apps are not available: Health data sharing, respiratory rate, irregular heart rhythm notifications, ECG, Cycle Tracking, Sleep, Blood Oxygen, Podcasts, Remote, News, Home, and Shortcuts".
In regards to the App Store not showing, check for any Screen Time restrictions that may be in place:
Use parental controls on your child's iPhone, iPad, and iPod touch
Take care.