So I watched some videos about ancient Egypt and saw that the 23 dynasty of Egypt was ruled by Nubians, so It made me think if Nubians had a certain huge percentage of Egypt.
Yes, there were quite a few people of Nubian ancestry living in Egypt as early as the Early Dynastic period, and Egypt grew steadily more ethnically diverse over time. I addressed this in more depth in What was the the culture and ethnicity of ancient Egyptians?