Dear Lee,
The Mendix apps are web based are limited to web API that are available.
For the Native mobile client you have to implement the react native modules, if there is no “ready to use” module available
https://medium.com/wix-engineering/creating-a-native-module-in-react-native-93bab0123e46
Not an easy ‘low code’ task, but it could be possible
Cheers, Andries