On the workspace, tap on the card with the « + »;

Tap on the button with the cloud icon;

Tap on Add new;

Select the Excel file (.xlsx) you wish to add within the list;

Verify that everything on the shown form is correct;

Tap on the floppy disk icon to save it and send it in production;

The form will now appear in the list of available forms after pressing on the card with the "+" icon on the workspace. You can now open the form to complete it.