It's amazing that what should be such a basic feature is firstly, not implemented, and secondly, lacks any documentation or advisory that it is not a a basic feature so that I have waste hours scouring the docs, the internet, and posting here to get any information about it. DOMO seems to perpetuate itself by lies of omission.

@jaeW_at_Onyx I watched this video already. There was nowhere described a method to grab the global page filter parameter. I've already reached out to a DOMO consultant who advised the only way to do it was build a date filter in a DDX brick.

You are mistaken. I've looked at the output already and it doesn't contain this data. It does contain the information for any card-based filters you've created on the page, but not any global page filter settings.