You can do an a1c test at home or in the doctor to identify chronically elevated glucose (prediabetes). It's insensitive to time of day or fasting status you can just take it every few years or so at your convenience.

Continuous blood sugar monitoring is probably overkill given how easy and cheap a1c tests are now.

Blood pressure, on the other hand, is still a nightmare. A good way of reliably and simply measuring resting blood pressure would be a game-changer.