Hi Margaret, and welcome 😁
Another reason they'll do full blood tests for everything, is that very often type 2 diabetes and or thyroid issues can present with symptoms very similar to meno type symptoms. In the case of insulin resistance (the stage before type 2 has fully developed) an optimal diet can go a long way to stabilising blood sugars and stave off developing fully blown diabetes. If you have thyroid issues, very often you will see an endocrinologist to help manage those too.
If those things are within normal range (or well controlled with medication, etc) on a blood test, and you're around the right age, then symptoms alone should give the doctor enough information to describe you as peri/menopausal. And the guidelines suggest to manage the hormonal ebbs and flows of this time. Once these are under control, and the anxiety and depression are not, then is the time to look into additional treatments such as ADs, counselling etc
It's a journey alright! Good luck with it all xx