Bubble bath product suggestions

My toddler started potty training about 2wks ago and got the hang of it fairly quickly. But I noticed that she gets very nervous for bath time. And once she’s in the bath, it’s a full blown meltdown. It was to the point that she would cry so much, she would throw up. She’s never had issues with bath time before potty training and no one else besides me gives her baths. I’ve realized that when she was in the bath, she would hold her pee. Even if I tell her it’s ok to pee in the bath, she would still freak out. Even if I took her out and she went potty, soon as she’s back in the water the meltdown continued. So I bought a few things to make bath time more fun such as Honest brand bubble bath, crayola soap paint, and a fishing toy. The one thing that keeps her from freaking out is the bubbles but unfortunately she has very sensitive skin. She’s starting to get a rash after 3 uses. It doesn’t seem to bother her and she’s not itching but I don’t want to use a product that’s obviously giving her a rash. But I also don’t know what we’d do without the bubbles as she freaks out without them. I need any and all suggestions for bubble baths meant for sensitive skin. I know hello hello is one but I can’t seem to find any reviews who talk about sensitive skin so I’m not sure if it’s a good product. Please help me!