I was quite interested, so I looked up settlement grants by nationality. I might have interpreted these stats wrong but going by this:
https://www.gov.uk/government/statis...les#settlement
We've given 1.8 million people from outside the EU settled status since 2010 and 5.7 million Europeans settled status since leaving the EU.
I couldn't break it out between leave to remain and indefinite leave to remain.
So this would impact a lot of EU citizens.
These statistics don't include pre-2010 applications, and I was unable to work out the situation with Windrush. In theory, Windrush people should have had ILR. Some might have done. I am unsure of the legal status of those who went through the recent Windrush scheme.