I am diabetic and just got my order for insulin and other meds a need, no problems. I think it is probably a matter of which chemist you use. In normal times, I swapped one chemist for the one I now use because they always took two or more visits for me to be able to get my full prescription completed.
Once you have a good chemist have your doctor send the prescription electronically, they all do that these days.
I am learning this. My Dads pharmacy seems rather poor -they often dont have all the prescription, or theyve forgotten to order it.