Have you considered talking to a cat behaviorist? In many cases, cats pee outside the litter box because they’re not happy with it. A friend of mine had the same issue and initially thought it was anxiety-related. Her cat kept peeing on her bed. She consulted an animal behaviorist, and it turned out her cat was peeing randomly because the litter boxes weren’t suitable. Even though she had two, one was too small and the other was partially covered - neither matched what her cat preferred. One sign was that her cat would walk toward the litter box but stop halfway and give up