I've always been a night owl and WFH seems to fix my mental health after years of trying to force myself to work during "normal office hours" (let's just agree to call them bricklaying and farming hours) in noisy office environments (I'm doing a mixture between natural science and AI which requires plenty of focus).
I'm slowly regaining trust in my ability to focus, getting into flow, and feel "normal" again. I'm starting my day with food-related stuff, sports and work communication, then going for an open-end session only towards late afternoon when communication slows down, working into the night.