Sorry that you cannot find the lens profile for DJI Osmo Action camera in Lightroom.
The DJI Osmo Action lens profile is available in Lightroom since the Lightroom Classic version 9.0. Which verison of Lightroom are you using?
Please check https://helpx.adobe.com/camera-raw/kb/supported-lenses.html#main_List_of_supported_lenses
To find a lens in this list, do one of the following:
Press Ctrl+F (Windows) or Command+F (Mac OS) and search for a lens by name.Filter by lens manufac...