If if I were to do OMAD or 20:4 TRF and made dinner my one meal or dinner time my eating period every time does your body still fast effectively or are you going to see better results if you are swapping out which meal or eating period you do???
Actually, consistent time windows are ideal in the sense that your body will get used to not being hungry outside of your window.
It also helps maintain your circadian rhythm which is important for a magnitude of reasons.