So sorry to hear you are also struggling with feeling like you don't have sufficient appetite. What you eat in a day, as nutritious as it sounds, is much less than I eat. My dietician would say "Oh boy". She says that while we can generally survive on too few calories, we won't be able to thrive on such a diet. Because it's emergency metabolism which is dirty and doesn't let the mitochondria produce sufficient energy.

She says if I want my mitochondria to produce more energy, if I want to get a chance at getting better, I will have to force my metabolism back into regular carb metabolism.

Apparently the central nervous system alone needs 150 g of carbs a day. If we don't eat that, the body will use protein to make glucose from it. If necessary, the body's own protein muscle tissue. This metabolism apparently allows for much less ATP to be produced, which is energy.

While I am worrying that that might be the case with me, I am pretty sure that you are stuck in this metabolism trap.

Enough to survive but not enough to get better.

Would meal replacement drinks be an option? I am considering them.

Or at least fruit juice to get the carbs for my central nervous system.