It's kind of an open secret that the space shuttle payload bay dimensions were specified to fit the satellites the NRO used[1]. Similarly, the Hubble Space Telescope is widely acknowledged to be based on the KH-11 Kennen, and the Nancy Grace Roman Space Telescope is unused NRO hardware from the Future Imagery Architecture[2]

1 https://mashable.com/article/nasa-space-shuttle-secret-spy-s...

2 https://en.wikipedia.org/wiki/Nancy_Grace_Roman_Space_Telesc...