We live in the UK - which has a fantastic free provision for diabetics, my daughter has a Diasend artificial pancreas (on her phone + a sensor on her arm and a pump for the insulin controlled by the app). This gives her very very high levels of control and flexibility.
However, when covid hit I was really scared because I thought that if things went really wrong (beyond loo paper being sold out) there would be no possibility of me protecting my daughter - I simply had no means to provide insulin for her that don't depend on a large scale modern pharma supply chain.
Any way that was viable for insulin to be made in a shed or a garage would be huge from my perspective because it would give me an option in the case of a SHTF situation - right now I haven't got one. If things go bad, my daughter dies - no if's no buts. I know (in my heart) that the reality is that if SHTF then I will die too, but the sheer hopelessness of my daughters position is really hard to take.