Thanks for the feature request!
I think we had an idea which would make this possible and is probably simple enough to have a good user interface for:
- allow workflows to specify a stack
- and allow multiple workflows to be triggered by a single code push
Combining the two would make cross platform projects way easier to manage, as you could specify an Android specific workflow and an iOS specific one, using workflow chainging to not to define the common parts more than once, and then have a Trigger which would start both, on separate stacks.
I’d definitely 
this - @JoshPike don’t forget to vote on this feature request! 
Notes:
- I’d probably drop in a trigger map format revision too: Trigger map v2 - restructuring
- Commit/Pull Request status reporting should happen separately for the separate workflows, so that you can see on GitHub/… that e.g. the iOS build failed, but the Android one was successful