I do not WFH and unabashedly eat breakfast at my desk every single day lol.
Not a single person has said a word to me, and my direct supervisor and their supervisor have both seen me doing it. Not a word.
My philosophy has always been - and I’ve told the employees who work under me many times - as long as you complete the tasks assigned to you, and are performing the role that you were hired for, I don’t particularly care what you’re doing in the interim (as long as it’s not something that is explicitly against the Code of Conduct). Giving people a little breathing room, and, ya know, treating them like human beings instead of soulless automatons, goes a long way. My team is generally more productive, and is nearly always the front runner for task resolution times compared to the other offices.