Information:
You can check whether software supports Save Data Cloud backups in the following ways:
From Nintendo eShop
Select a product in Nintendo eShop and scroll down to view the software details.
From the official Nintendo website
Visit the Nintendo website and view the information for the desired software.
From the software's Options menu
If you already own the software, go to its Options menu, and select "Save Data Cloud".
If this feature is supported, you will have the option to select a user and back up your progress.*
It will be indicated here if the feature is not supported for the selected software.
*An active Nintendo Switch Online membership is required.