Hi X Perry Mentor,
I would check with Dexcom whether the product you are uses the ANT+ CGM Device Profile, as I think it pre-dates that. If it does, then you would need to sign up as an ANT+ Member (cost $1500) to download the device profile (as it's still in beta release it is not available yet to ANT+ Adopters), and you would need Dexcom to let you know the permission key for the device.
Could be worth checking again with Dexcom whether they can give you more information about when/if their app will be available.
Kind regards,
Kat