Can not connect via Bluetooth to my glucose meter and GMC truck

Hi nichloas16

welkome to the Apple (user-to-user) Community.

Re: Can not connect via Bluetooth ...

Maybe you have an instruction sheet with each item, or an app(s) to download from the manufacturer(s) ?

Wondering if this Apple Support article can help:

How to: Pair a third-party Bluetooth accessory with your iPhone or iPad - Apple Support

Trouble-shooting:

What to dp: If you can't connect a Bluetooth accessory to your iPhone or iPad – Apple Support

All the best :-)