I once met with Iridium [1] engineers not long after the collision of one of their satellites with a Russian weather satellite [2] in 2009. The meeting was for another purpose entirely, but since the collision was fresh news, it naturally came up in conversation. The Iridium folk told me that they would receive warnings from NORAD of imminent collisions, defined as two satellites coming with 500m. They were receiving warnings to the tune of 10 or 12 a day, so many that they basically started ignoring them.

[1] https://www.iridium.com/ [2] https://en.wikipedia.org/wiki/2009_satellite_collision

"Space Force’s urgent alerts sent OneWeb engineers scrambling to email SpaceX’s Starlink team to coordinate maneuvers that would put the two satellites at safer distances from one another."

This is exactly how it should work though.