There is definitely canon the whole way through. If something happens that will happen regardless of your choices it is regarded as canon and will happen on every single path that anyone could possibly make.
E.g. Burkes getting divorced is canon, but whether Jade gets half the money is not canon.
Or: Tremolo having a tantrum when Josy arrives at B&R and storming out is canon. Staying with Sage is not canon.
So, the message to Zoey is canon, because it happens, no matter what. (Why he sent it and how he feels about it, is open to your interpretation).