What is the average running pace for males during PS?
There is no real average. The IST provides a baseline. Coming out of the IST, you are then placed in a running group based on your time. The workouts will then be designed to push you, but they won't be impossible for your ability. If you show up and give honest effort, PEP will take care of the rest. USNA has been developing MIDN physically since 1845. I remember 40-60% show up to PS without the requisite fitness to pass the PRT. PEP drives the failure rate to the PS PRT to somewhere around 2-5%.
If you want a baseline, be sure to be able to run 1.5 mi in 10:30 or less. If you want the most accurate assessment of your physical fitness, here are the PRT standards for males:
2 Min Cadence Push Ups (1 sec up, 1 sec down): 35 Min, 60 Max
2 min rest
Forearm Plank: 1:45 Min, 4:20 Max
4:20 rest
1.5 Mi Run: 10:30 Min, 8:15 Max
For the OP, here are the female standards:
2 Min Cadence Push Ups (1 sec up, 1 sec down): 20 Min, 45 Max
2 min rest
Forearm Plank: 1:45 Min, 4:20 Max
4:20 rest
1.5 Mi Run: 12:40 Min, 9:35 Max
Source (which also includes form requirements):
https://www.usna.edu/AthleticDirector/_files/documents/DIRATHINST_6110.2C_dtd_10_Nov_2019.pdf