As a software license administrator, you can convert ArcGIS Pro add-on licenses acquired through ArcGIS Desktop to Single Use licenses if the corresponding ArcGIS Desktop license is Single Use. Licenses are converted in My Esri. ArcGIS Pro Named User licenses that are included with the Creator, Professional, and Professional Plus user types can't be converted to Single Use licenses.
For more information, open the My Esri help and go to Common Questions and Guided Help.