Originally from Wales but have lived in Scotland since 2001 ( my accent is certainly different ) ,i have been diabetic for 43 years only received PIP after my leg amputation , I’m not saying you won’t get PIP for diabetes alone, as it’s been previously stated it’s all how your “ disability “ affects your day to day life, the forms can be an absolute nightmare , my advice would be to get the CAB to help fill your forms in explaining exactly how your affected ,