• No ….. from the manual : 

  Power Guide

  You can create and use a power strategy to plan your effort on a course. Your Edge^®device uses your FTP, the course elevation, and the projected time it will take you to complete the course to create a customized power guide.

  One of the most important steps in planning a successful power guide strategy is choosing your effort level. Putting a harder effort into the course will increase the power recommendations, while choosing an easier effort will reduce them(Creating a Power Guide). The primary goal of a power guide is to help you complete the course based on what is known about your ability, not to achieve a specific target time. You can adjust the effort level during your ride.

  Power guides are always associated with a course and cannot be used with workouts or segments. You can view and edit your strategy in Garmin Connect and sync it with compatible Garmin^® devices. This feature requires a power meter, which must be paired with your device (Pairing Your Wireless Sensors). After the devices are paired, you can customize the optional data fields (Data Fields).

Thanks, I did read the manual, but unless it's right in front of me and I don't see it, I don't see any mention that power-guide-related data fields are not available outside of that single power guide screen.

The problem with the power guide screen is that the only layout available is 2 small data fields, not even a double-wide to use connectiq apps like MapDashboardMS, so it make it very impractical.

Adding one power guide target in another screen would be sufficient for my use case, and I would settle for a single, double-wide field (with a good connectiq data field) on that screen if that was the only option.

Yeah, it looks like you're 100% correct.