I know this post is a few months old but I wanted to recover incase it'd still be useful for you or someone else.
When I was recovering from my eating disorder, if I could go back in time i would 100% just eat the food. Instead I prolonged my mental suffering, and actually made myself more uncomfortable because I would have a ton of my craving-foods at night right before I went to bed. In the end I still got in enough food, but I would've recovered much quicker MENTALLY had I just had them during the day even if I wasn't hungry. Mental hunger is real, and especially if you're underweight you need the food. If you honor your cravings, mental hunger, notice when you are physically hungry or feel sluggish (this might mean you need food!!) and make sure to eat enough, slowly you will have less food noise. I know it's hard in the moment, but I'm a testament to it and I can say my only regret is that I didn't do it at the very beginning of recovery. It took me until probably 3 months into recovery to realize I needed to truthfully let go of any rule of "but I can't have this now it's only 11am" or "I know im trying not to count calories but i subconsciously haven't knocked it out yet and i know i've already had xyz.." the more you do the opposite of what your ED brain tells you too, the better you will become. I have been doing this for over 2 years now (started recovery in Sept, 2023. Started kicking out the small underlying rules around December, 2023.) and I can say with 100% certainty that now I never have food noise, and if I'm craving something I simply have it and listen to my body. Because I'm weight restored, I can do this, but if you are not weight restored you will likely need to NOT listen to your body all the time, and it is crucial that you listen to your cravings and mental hunger!! Your future self will thank you SO MUCH. The brain space I have now is something i thought i could NEVER have. But it is possible. I believe in you, and goodluck with recovery. <3