Is it possible to add a phase offset to stacked modifiers which varies per instance?
You want a random phase offset? Right click on that field, choose add driver, Python expression… uh… math.floor(random.random()*1000) should work
And when I spawn two instance collections they are both going to use a different value for random?
But how can I get the exact same random value (again per instance) for both modifiers in that stack?