Power Meters for running include the Stryd Footpod, the Garmin Running Dynamics Pod, HRM-Run, or HRM-Pro, the RunScribe Plus or Red, the Polar Grit or Vantage V, and the RUNVI insoles.
More recently, all of the major running watch manufacturers have included wrist-based power in their new models – if you have a recent watch, check with your watch manufacturer to see if it includes Power.
Personally, I’ve used Stryd Footpods (non-wind and wind versions) since 2018 and am 100% happy with them. Plus, Stryd consistently scores highly in reviews and comparisons (fellrnr, dcrainmaker, Outside) and comes with great customer service.