It's not possible, see:
What you could do is create your own microflow to import excel data. In this microflow import the data too a non persistent entity. Then after importing the data you could iterate through it and relate to the correct enum values.
As addition to Corne's answer
The Caption is displayed to the user, the Name is used as database value and within the modeler to validate, change, select etc. an enum value. Thus when exporting, the Caption is used as value in a column. When importing, you need to compare the Caption with the Name to set the correct value in the object member.
ExcelImportsValue = Milk-Fresh