Petco review: Disrespectful

I was in this location and a woman named Krys was checking me out, she had her mask on but below her nose down to her mouth. I asked her to please pull her mask up while checking me out and she stated she was the store manager and did not need to, she makes the rules. If I felt uncomfortable I could take it up with customer service but she is the store manager. I felt disrespected that for an entire minute you are checking me out you can't have the decency to just pull your mask above your nose? I am immune compromised and susceptible to Covid.