Hi,
From my perspective, no. Not a disability.
However, "reasonable adjustments in the work place."
If the blanket rule is "no phones on duty" i quite understand, but the practically is I use the device with a CGM set up to constantly monitor my bloods.
Another place had a no food on the shop floor. Yep, OK but I happen to carry hypo treatment "in the unlikely event" my BGs drop. (I will keep them about my person in a sealed container.) Along with my insulin for the occaision they rise?
Makes life easier all round for everyone..
I can honestly say in all working life I've never experienced discrimination on the grounds of my condition.