I think the going vegetarian will still depend on what you eat. Some choose to mostly choose lower carb foods, some like my husband just cleaned up what he ate and started losing weight, some choose a high carb almost no fat option which can help with insulin resistance.
I'm not sure I am answering your question? But here is the help I can offer with some ideas of foods that are good for sugar control issues
I am a type 1 and vegan, but my husband is a type 2 and vegetarian. The key for him seems to have been controlling his junk food eating , exercise and losing weight. Portion control of certain foods etc. Learning to snack on baby carrots, mushrooms and tomatoes. Obviously filling up on broccoli and most veggies, salads etc are much better for you. My husband still likes some junk food so he is on metformin and probably will stay on it.
Here is some ideas of meals we eat
I love veggie bowls, they are fairly low carb 20-35 carbs depending what you put into them and how much you eat. You can change up the protein and seasoning as you want
I'm for easy and you can pick out the pack of mixed frozen veggies you like, I change it for variety
I take a bag of frozen veggies (usually about 16 carbs the whole bag)
add either a pack of tofu, seitan, tempeh or any of the fake meats(4-20 carbs depending what you pick)
then add seasoning, gravy, braggs aminos, nutritional yeast, spaghetti sauce, or sesame salts, or the spices you like
any pack of sauce flavoring will work and changes the whole taste of the dish
This works for stir fries too start with a bag of frozen veggies
lightly stir fry with olive oil or for some different flavors, coconut oil or sesame oil
add your choice of protein
then season to taste. I like chinese food so a favorite is sesame seeds and sesame oil with garlic and ginger added
I also love whole meal salads where I put mixed greens, green onions, cucumber, tomatoes, avocado, bean sprouts, mushrooms, fake bacon or fake chicken strips, sometimes tofu, in my case fake cheese chunks or shreds, and sometimes peas, beans or a sprinkle of quinoa depending what I feel like. Of course dressing of your choice, find one you really like.
@Walking Girl is a vegetarian and a type 2 so she might be able to help?
I've also included some low carb sites for a variety of dishes
https://lowcarb-vegan.net/
https://www.staceyhomemaker.com/low-carb-vegan-recipes/
https://www.allrecipes.com/recipes/15475/healthy-recipes/low-carb/main-dishes/vegetarian/
https://lowcarbyum.com/category/special-diet/vegan/
https://www.ditchthecarbs.com/low-carb-vegetarian-meals/