I would do a couple of things:
Consider discussing with your doctor whether switching from Reta to a different medication might be more effective. Semaglutide or tirzepatide are options your endocrinologist could evaluate. Your doctor can help determine a safe starting approach and adjustment schedule, but in my experience, switching has been effective for breaking plateaus.
You may want to review your lipo C schedule with a qualified medical professional. However, given your GAD and afib history, I'd be cautious about adding stimulants like green tea extract without discussing it with your healthcare team first.
Your current protein goal of 162 grams seems reasonable given your malabsorption disorder and 1500-calorie intake. Rather than dramatically increasing protein intake, which could create nutritional imbalances, consider discussing with your endocrinologist whether a modest adjustment might be beneficial while maintaining balanced nutrition for your specific health conditions.
Hope this helps.