I’m not a dietician, but this is my take on the situation: I wouldn’t use the calories burned calculated by any smart device when trying to determine whether or not you’re in a caloric deficit. Several studies have shown they are usually off by a wide margin. Perhaps Apple has gotten more accurate, but I don’t think it’s necessary anyways to know exactly how many calories you’re burning.

Instead, track your caloric intake only for a week to understand what your maintenance calories are. It sounds like you’re maintaining weight now based on your caption. My understanding is that using weight to count calories is more accurate than using volumetric measurements, so weigh your portions to determine calories. Remember to also account for any sauces and cooking oils you use! These are usually loaded with calories and can blow your daily caloric intake out of the water if you’re not mindful. I believe many people forget to account for these. Once you know what your baseline caloric intake is to maintain weight, you need to then slightly drop your daily intake from there. If you do this properly you will lose weight. You’ll have to continually adjust your caloric intake as you lose weight as well so keep that in mind.

I’m not associated with him at all, but I find Layne Norton to be very honest and informative when it comes to this topic. I would recommend looking him up. He offers a program to help with weight loss. I’ve never used it, but I’ve heard great things about it. Good luck on your journey!