I can’t seem to find the answer anywhere, or, is their a cheat sheet? Basically, we are using Collector blue toothed with a Trimble R2. In Trimble Terraflex, the PDOP, HDOP, etc values are all automatically populated when features are collected. Is this possible within Collector?
Yes. You'll need to configure your feature service to record GPS metadata. Record GPS metadata—Collector for ArcGIS | ArcGIS should get you started, and the details of the fields that can be automatically captured are in Configure GPS metadata storage—Collector for ArcGIS | ArcGIS