Can the gabb support the Dexcom G7 or the Tandem t connect mobile apps?
Looks like they have Dexcom. Not seeing Tandem https://gabb.com/app-guide/ - looks like you can request an app from that page if it's not available. I don't think there is any guarantee they'll add it.
To do these third party apps you have to be using one of their Pro phone models (Gabb Phone 3 Pro, Gabb Phone 4 Pro). You have to be on the advanced plan too. Found this page that describes how to enable the 3rd party apps.
https://gabb.com/support/phone/gabb-phone-4-pro-user-guide/
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