A digital ID not based on EU hardware should be taken down with prejudice. It's a direct threat to national security. US companies and, by extension, US government authorities have control over every popular endpoint (mobile phones, desktop OS).

Besides, if someone wants a digital ID, it already exists in many countries. Phones with NFC chips can read many passports, e.g. Germany has an "electronic passport" since 2005. It's barely used, though, because it's bullshit.