Q.pampas grass
We cut our pampas grass to the ground this early spring and nothing is growing or showing any green yet. It is June. Is it dead? We planted last year. The grass receives morning sun half the day then partial shade. The soil is NC clay but we put lots of Miracle Gro garden soil in when planted. We fertilized this spring. We water periodically.

This is pretty typical coming out of a harsh winter and cold spring. Warm season grasses begin to grow much later in the spring as air and soil temperatures increase. I would take a wait and see approach for now.
For more information on pampas grass, please visit the following link:
https://www.gardeningknowhow.com/ornamental/foliage/pampas-grass/growing-pampas-grass.htm