Type 2 alone do not need to shield. Some uncontrolled type 2 with high hb1ac are however receiving these letters. Usually these are around the 77 or 79mmol range. If you feel you should have got one I suggest you contact your dr and discuss.
Its also a very good reminder to review your management of the condition. I see you are new to the forum. Maybe we can help on that front. My signature has some links that describe how many of us in here manage our condition well with our diet, often without meds or with big reductions in them. Have a read and come ask questions.