Have a model that I am running from the dialog box. The final output in the model has 'Add to display' enabled and is not a managed layer. However, I am aware this setting only works when running the model from within Modelbuilder.
According to the ArcMap help:
Add To Display has no effect outside ModelBuilder. When running a model tool from its dialog box or the Python window, the Add To Display setting will not be honored. To add model data variables to the display when running the model from its dialog box or the Python window, make the data variable a model parameter, then enable the Add results of geoprocessing operations to the display option from the Standard toolbar: Geoprocessing > Geoprocessing Options > Add results of geoprocessing operations to the display.
Where is this setting in ArcGIS Pro?