@Rayyan i think you need to explain what you mean by “Diabetic Patch”.
You could mean the Libre sensor (as modelled by Theresa May,
here). This is a blood glucose sensor which does not give insulin; it measures your BG.
You could mean a patch insulin pump such as an
OmniPod. This can be programmed to pump insulin.
The availability of these and qualification criteria vary per country.
It should be noted an insulin pump is not a silver bullet. You still have to carb count, you have something attached to you 24 hours a day, you have to work out your basal rates and it can go wrong.