It's not a national team roster. It's a roster for the camp. Same as it was for the last national U15 camp. A wide net is being cast. No matter the potential trip to Germany, Spain, etc, it's all an experiment at U15. Gets more serious at U17, but even at U17, it's very preliminary and no predictor for the senior USWNT. At U17, the GOATS will be going pro (though not all U17 who go pro are in reality GOATS).
IMO, humble as it is, the world cup team, the olympic team, gets selected from the potential shown at U19 and from the pro ranks. SO sit back parents of younger players and just enjoy watching them play.