Hello,
Just jumping in there, with hopefully an answer to your question added to my "Welcome!". You know you make loads of insulin and are resistant/insensitive to it. You become insensitive to something when there's lots of it, so it doesn't register anymore. Then putting even more of the stuff in seems rather counterproductive, right? If you look at it like that? You're on insulin now, odds are you'll keep adding to the insensitivity over time and will require ever increasing amounts of the stuff for it to have any effect. The plate method in this case wouldn't actually work all that well, (it rarely does if not combined with low carb), so yeah... I know it's a big read, but you might want to take a look at Dr. Jason Fung's The Diabetes Code. People can actually come off of insulin and repair some of their resistance. Though I have to say, between your age and weight it really, really is surprising you're a T2. Ah well. Stranger things have happened, and if you've had the tests, you've had the tests. Anyway, have a read here, see if it resonates, and whether it's something you want to look into:
https://josekalsbeek.blogspot.com/2019/11/the-nutritional-thingy.html
Mind you, with the not needing/wanting to drop weight, you'll have to eat well and often. No intermittent fasting and such for you. Also, don't jump in with both feet without adjusting your insulin dosage, you'd hypo rather awfully most likely.
Be safe and keep asking questions! You'll be in this body for a long time yet, so best to keep it well-oiled.
Hugs,
Jo