Using cloud storage (Nextcloud, Dropbox...) from app

Hi, I would like to add “cloud synchronization” to OSM Scout collections. It means synchronize recorded tracks with cloud disk in form of gpx files. I would like to avoid adding account setup and integrating webdav library. Instead, I would like to use system wide cloud account. But there is no documented storage API ( ) and it seems that related library is not allowed in Harbour ( ).

Is there any plan from Jolla side to allow such API for applications?