@domo AFAIK it's entirely the responsibility of the municipality to determine the collection policy, and to communicate how it works, so I wouldn't expect a better source to exist than the municipality's own site, unfortunately.

It's plausible that there's only separate collection in parts of Amsterdam due to the difficulty of retrofitting extra collection infrastructure into existing neighbourhoods, I vaguely recall that being brought up as a rationale for post-collection sorting at one point. Though for newer neighbourhoods I *would* expect separate collection, and if there isn't, that's probably a good reason to complain at the municipality...