Early morning shopping rant

Normally I start around 815am however yesterday I started at 615am as I received a decent order from my house. I get to Walmart, it was about 17 grocery items, nothing crazy, and go to check out. Scan QR code, receive good to go, start bagging. Walmart employee from self checkout walks over to someone else who I heard ding for a cart check, does it but then walks over to me and says did I scan the QR code, I said yes, and I held up my phone that I sat on the self checkout and showed her the "good to go screen". I then sit my phone down and she goes and picks it up and says "I need to see it" preceeds to start fooling with my phone, I said ma'am in a stern voice give me my phone, and I'll show you whatever you want but I don't appreciate you handling my phone. A coach (edited from couch trolls 😘) was standing right over her with a look of disbelief at her.

Isn't it still their policy to not touch our phones under any circumstances? I really don't care to show them the order etc as I have nothing to hide. I also thought unless it pulls a cart check they were supposed to leave us alone, that's what the door greater is for?

Would you have done anything different?