When trying to Export from PBI via Analyze in Excel, raw measures from the dataset are not "porting" to Excel as measures.
This requires creation of a "Custom" measure which is a duplication of the same data in PBI even though the data column has already been defined as a measure in PBI.
I have tested on my side, it works well. all the measures are ported into excel.
And make sure you select the correct version for your version of Excel.
Please refer this article.