I notice the same pattern. Lifting three mornings a week used to leave me ravenous within two hours, but on reta the opposite occurs and I can only manage small amounts three or four hours later. On rest days there's mild food noise without real hunger, easily handled with a carrot and water. High activity days now leave me less hungry than low activity ones. I suspect the body quiets appetite after burning mostly fat stores, similar to how active days made intermittent fasting easier before.
Over the last few weeks I've seen this recurring thing and wondered if others experience it. After hiking more than ten miles, eating becomes impossible for me, even water is hard to get down, but energy levels stay high which feels odd. This lasts two or three days, making it tough to eat at all, until hunger comes back and I resume eating once daily. It seems tied to heavy exercise, which boosts the reta effect and wipes out appetite.