Hi
@Alan W. Welcome to this forum.
As others have said it does sound as though you are Type 3, probably 3c (although that might depend slightly on why you lost most of your pancreas in 2019). But the significant thing is that, in my non-medical opinion, your original diagnosis as T2 was flawed from the outset.
It also sounds as though you've moved from getting some insulin from a boosted failing pancreas (thanks to the oral meds of Metformin and Gliclaczide) and now need to be injecting insulin. That might sound alarming but in fact is most likely to bring you stability and control with your blood glucose; it's not something to dread - rather something that will greatly help.
The way forward will initially be a bit tortuous and you URGENTLY need your GP to refer you to a Specialist Diabetes Clinic. In general T2 is dealt with by GPs and many surgeries will have a nurse who deals with patients with diabetes; that nurse may well be the focal point for diabetes in the GP clinic, but is highly unlikely to know much about other types of diabetes. I'm not criticising or trying to be rude about GP clinic diabetes nurses, but they are a long way from being Diabetes Specialist Nurses (DSNs) who work in hospital based Diabetes Clinics.
To further complicate matters T3c is pretty rare, misunderstood and can be, incorrectly, categorised as T1. I was discharged after my total pancreatectomy with my notes stating I was T1; totally wrong BUT at least it ensured that I was recognised as insulin dependent and automatically became eligible for the full spectrum of treatment that T1s can receive. There is confusion within the NHS about T3 (any flavour from a-h) and because 3 comes after 1 & 2 it is sometimes seen as minor (less severe) than T1 or T2. So I've had to wrestle sometimes with well-meaning but poorly informed medical professionals, explaining that T3c can be an even less stable form of diabetes than T1. Eggyg alludes to this, but is generous in thinking that medical professionals are more clued up nowadays; my experience is that they aren't. So be prepared to be robust in getting what you need. I am wholly dependent on Creon to replace my non-existent digestive enzymes which went when my pancreas was removed; even that needed polite but strong vocabulary to stop someone thinking I could manage without!
So I recommend be politely robust, get your GP onside and recognising that your case is probably outside the scope of general practice - thus get a referral to a Specialist Clinic.
Good luck.