I'm concerned that 6 ounces is to much. I'm avoiding breads sweets and no carbonated beverages. I avoid fluids 1 hr to 2 hrs before dinner and I notice I don't get that full filling. I stop at 6 oz and I am afraid I can eat more but I don't. Is this normal. ?

What type of protein are you eating? In general you only need 3-4 oz of protein per meal. Nonstarchy veggies should be present too.

Chicken meatloaf or boneless skinless chicken thighs. Side of cauliflower rice or 3 oz yam

Personally I would avoid rice, but that's just me. It's an empty carb that isn't going to benefit you in any way. Don't get me wrong...I love rice, but I avoid it these days.

You really do not have to avoid fluids that long before a meal. 30 minutes is the normal cutoff time prior to eating. Fluids don't stick around in the stomach for long.

A lot of people chase the sensation of always wanting to feel full. Personally I don't get the point. Feeling full these days makes me miserable for the next 30-60 minutes after eating. I measure out my portion (about 6 oz as you), eat, and am done. That's my meal and that's it. I don't try to find something else to eat because I feel that I can fit more in.

I do understand the concern but just focus on the portion control. Foods are going to sit differently in your stomach depending on the source. I could get away with eating 1 cup of cottage cheese with a little bit of fruit in it and not feel full, but if I ate 3/4 cup of chicken salad I'd feel miserable.