That you feel the need to give advice despite being monumentally unqualified to do so should give you pause. Your chosen name "godmode2019" speaks for itself.

None of that comment is true except in the most general sense. You think you are giving advice, but the OP and other parents of Type-1 children have vastly more knowledge about diabetes, "childhood sleep and nutrition" and what it all means for their lives. Twice nightly blood sugar tests are unavoidable in many patients. No, you don't have to wake up the child necessarily. It's a simple finger prick at worst, so they might not even wake up or go right back to sleep. With modern sensors (which are less reliable) you only need to swipe the reader over the sensor.