I'm an otherwise healthy, fit cis male but goddamn I feel like any "oommph" I had before starting a workout gets vacuumed out. It might be motivation. It shouldn't be hunger. How do you deal with it? Roughly a quarter of the time I can "aggro" my way out of it and have a normal ~30m workout, but other times nah. Shit sucks.
If that's the case you should start with shorter or less intense workouts and build up from there. You should feel a sense of accomplishment when you're done and there's no shame in adjusting the workout length thats challenging but achievable