This isn’t an easy question to answer because we have different needs & we are different people. I was at my goal at 6 months but kept losing as I struggled to eat enough at first to slow the loss. My surgeon told me to work up to about a cup of food by maintenance & I guess that was pretty true but it did depend on what I was eating as some things were more filling - still the same now. I was barely eating 900 calories at 6 months & then about 1300 when I stabilised at about 15 months. I eat about 1400 now & generally eat about or a bit less than what would be considered a recommended serving size. Someone taller, younger, more active than me, heavier than me & with a larger frame would need to eat more & vice versa. And of course the foods you eat also okay a part. I’m a low processed make it myself person, eating lower carbs, very little sugar, lowish fat.
Have you spoken to your team about the foods you struggle with? What do you mean by struggle - make you feel sick, feel your restriction, sit heavily, taste, etc.? Is it a specific food/s, food group or any food randomly? Can you relate it too how much you eat, how fast or even when you eat? (Sounds odd to ask about time but for example I have difficulty eating breakfast before 8:30/9am.)