Well, the US CBP entry for visitors is becoming far worse than what I experienced in China in 2018/19 with the changes the current administration wants for US visitors. The CCP didn't require a mobile app, once you're in the US rights apply to everyone.

As Brian Krebs posted, it's just as bad as it looks from the privacy perspective

#privacymatters for everyone, and this is not privacy, I think the government needs to consider the 4th amendment exists re that App
https://www.privacyinternational.org/news-analysis/5713/trump-administration-wants-your-dna-and-social-media