The default workout screen on the watches is useless, because as you’ve noticed, they only display lap power. The best setup that I’ve found is to use the connect iq field “datarun ultimate” it was designed for running with stryd (a running power meter) but works for cycling as well, and has added the workout fields that aren’t available otherwise.
My set up from top to bottom is:
Elapsed time. Time left in workout step
Heart rate. Cadence
3s power. Lap power
Low power range. High power range
