You’ve made fantastic progress from your starting point and everything @Momof5 shared above is excellent guidance.
I would only ask: How hungry are you? Are the 1000 kcal/day really satisfying you for this long a stretch in time?
As you probably know, if we continuously eat markedly less than our body requires to properly function, our metabolism begins to wind down in an effort to preserve our life. At some point, an under-eater’s incremental weight loss comes from muscle and organ tissue, not from body fat. And that’s when it becomes a downward spiral that’s hard (and slow) to correct - and it usually involves regaining some fat back, too.
I don’t know what your “required” caloric intake is (and calories are a somewhat squirrel-y way of talking about proper nutrition anyhow), but 1000 kcal/day for an adult (of any size/shape) strikes me as being far below what is a healthy for any extended length of time.
If I were in your situation and I felt truly stuffed after eating within a 6 hr “feeding window” but could only muster eating 1000 kcal, I’d seriously consider expanding that window to make room in my digestive system for more healthy animal fat. Basically, I’m repeating what @Momof5 has already encouraged you to do.
Remember: Animal fat is the macronutrient type that affects insulin levels the least. So as a T2D individual, adding fat would be the least disruptive course of caloric increase you can take up.
But, importantly, since you’re clearly fat-adapted by now, it will provide you with more of the vital energy content you need to keep your metabolism functioning properly - which in the end is what you’re trying to accomplish, right?
It may slow your weight loss pace - and if you’ve already forced your metabolic rate much lower than before, you may even gain some weight back. But either way, you will become a “healthier you” in the process.