TID 51 years, in Oz.
Not sure if you are on any other medications but my doctor many years ago prescribed a blood pressure tablet to protect my kidneys long term. That may be worth asking about.
In Oz eye tests are usual for diabetics every 2 years and usually a yearly urine test to check for kidney issues.
And I assume you have been seeing some doctor for continuation of your driver's license within the past 2 years. Keeping yourself free of hypos is important as I am sure you know.
Before my diabetes appmt my doc used get me to do intensive finger pricks tests for 2 days or so, before meals and 2 hours after meals, to see what my BSLs were and so that any changes to insulin doses and timing could be worked out.
It might pay you to do some such readings before the appointment as this will give the doc the sort of information to best help you. Continuous Blood Glucose Monitoring (CGM) is the fancy and more detailed way to do these tests.
I read information that the blood sugar control in the first 10 years or so of being diagnosed with diabetes has a bearing on the risk of complications later in life. So it sounds like your visit is timely to help you keep as stable as possible.
Best Wishes. Diet, Exercise and Insulin.