@Danny911_J, thanks for posting in Q&A. To automatically enable the Camera Upload setting for the OneDrive iOS app using Intune, you will need to use app configuration policies. But after my researching, I don't find this configuration key mentioned in our official article.
The available configuration parameters and their implementation are decided by the developers of the application. You will need to get these configuration settings (keys and values) from the OneDrive team. You can open case or ask in the following forum to get help.
Thanks for your understanding.
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