Had to google SRGB to see what it was...
I came to iPad 7th gen from 5th gen. According to what I read tonight, 5th and 6th gen ipad both have SRGB.
All I can tell you is, I cannot see any difference whatsoever in quality of colors, or anything else, on my 7th vs. my 5th display. I have them tonight both side by side on several websites, internet videos, and then on some channels of live TV...I cannot see any difference.
As I said in a previous post, the reduction in page refreshes on 7th vs. 5th gen. is unreal for me.