Well, it took Juniper only 2 years find in 2015 the likely NSA implanted backdoors in their firewalls. Then the weakened Dual EC DRBG has been found.

Now (2023/2025) another two have been found.

Cisco equipment has been intercepted and implanted in the past.

So definitely "the community" can find things, sometimes it just takes ages.

And to add to your Crypto AG, Anom was also a nice example of the sting like this.