Lack of innervation to the feet and ankles minimizes signalizing and recruitment throughout the kinetic chain, especially to the hips. If you have weak feet and ankles, it's even going to be difficult to target the glutes!

Go barefoot often, wear minimalist shoes, and try this drill:

Single-Leg Kettlebell Swap

Any single leg stand variation, such as the kettlebell swap shown here, is excellent for improving strength and function.