Hi
@CoastGirl
A couple of things come to mind - as someone else said, maybe some resistance exercise would help with insulin resistance.
You also mentioned intermittent fasting - 16/8 or 18/6. I wonder whether it would be worth trying only having 2 meals within these windows, rather than 3, or alternatively adding in a couple of 24 hour fasts (dinner to dinner or lunch to lunch) each week. I found that really helped with lowering blood sugars. Given that you don’t want to lose more weight, then you might need to adjust your diet to include more fats.
Good luck with all of this.