The latest articles I have seen show that Congress requested that protection on February 15.
I have seen no confirmation that she has received that protection.
Ref:
https://www.nytimes.com/2024/02/15/us/politics/nikki-haley-secret-service.html
Hopefully she drops out after Super Tuesday and this issue becomes moot.
As I recall, Dan Bongino, former SS agent, explained that the beginning and end of SS protection is never made public until long after the fact, for security reasons. But easy enough to figure out for anyone following potential protectees closely.