This is just monitoring, not a pump. There is no learning or tuning or dosing. If it’s anything like the Freestyle I wore for a while there’s a self calibration process that takes a couple hours, but that’s per-sensor, and those get changed out every two weeks.
I will point out the obvious tensions between these legitimate concerns and the usual HN "we demand full unfettered access to all the firmware knobs all the time" groupthink.