Add custom option in main dashboard

I’m using Uppy for document uploads in my SaaS. I have a scenario where users can either upload files from their local system or select from documents already uploaded in a folder tree. I need to add an action trigger within the Uppy component to allow users to choose a document from the existing folder structure. Once selected, the file should be added to Uppy just as if it was uploaded from the local system.

Any guidance on how to achieve this would be appreciated!

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