[supermatt]

if they are basing avoidance on the known trajectory of other orbital objects, what happens when those object also manoeuvre?

[wereHamster]

Presumably if the other object is human-controlled, they coordinate (the counter-party also has interest in avoiding collision). If the other object is debris, they coordinate with physics which is highly predictable.

[yreg]

At least a portion of those maneuvers has to be autonomous, it averages to one every 10 minutes.

I imagine a human controlled object wouldn't be placed on a collision course with a Starlink sat, so it shouldn't come to them having to negotiate how to dodge each other.