She only does it with clutter. Think socks on the floor, old papers, and most recently my laptop bag was on the couch—she peed on it. She’s even tried to pee on a sock RIGHT in front of us. I was worried it was a health issue until we realized she ONLY does it with clutter. The couches themselves? Not an issue. Something left on the couch? Pee. Wtf do I do?!
It sounds like she might be marking her territory or expressing anxiety. Try to keep clutter off the floor and couches as much as possible.
Consider providing her with designated areas to explore or play. Sometimes cats feel overwhelmed by too much stuff around.
Try using enzyme cleaners on the spots she peed. It might help deter her from going back to those areas.
It might help to create a more structured environment. Cats appreciate routine, and it might ease her anxiety.
Have you thought about using pheromone diffusers? They can help calm anxious cats.