Kants copernican revolution placed the observer squarely back into universe. The universe wasn't just an objective reality out there, but also entangled up in our own ways of knowing and perceiving at a fundamental level, that is our understanding of what is space and what is time.
Did his thought have an impact on the acceptance of the copenhagen interpretation of QM where the observer is required to collapse the 'wave-function' and render an observation macroscopically visible?
Note: Poincare had read Kant - he thought that Kants noumena were the unobservable referents for a theory; for example,the gravity field - and he was involved in the research effort to understand relativity and plancks quanta - (not QM unfortunately), I'm mentioning this to show that the scientific research community wasn't completely unaware of developments in philosophy.
Of course, Kant made a number of contributions to scientific thought, So that may have helped to establish his reputation & circulate his ideas amongst the physics research community.