I know of no districts that were carved out to preserve a white majority. Not to say they don’t exist, just that I am not aware of any currently.
But I do know of several contorted districts that were carved out to create oxymoronically-named ‘majority minority’ districts.
The left had better be extremely careful what they wish for.
Both parties support gerrymandering because it basically locks most districts as “safe” for one or the other; now the complaint from blacks is that with gerrymandering they are consigned to a small number of safe districts which are easy for everyone else to ignore.