Nginx isn't a security company and doesn't make client-side software, so probably not. (Of course, theoretically nginx could be backdoored to give valuable info

Nginx isn't a security company and doesn't make client-side software, so probably not. (Of course, theoretically nginx could be backdoored to give valuable information to intelligence agencies, but it's harder due to the fact it's open source, and even if it was closed source the escalation in response to banning nginx could start a new Cold War. Imagine the US and Russia mutually banning use of any of the other side's software and actually trying to implement it.)