I'm importing a CSV file into ArcGIS Pro, I've used geoprocessing tool XY Table to Point but values have come in null. Column type is double in ArcGIS Pro. Highlighted is the column which imports null from Excel.
I suspect that the formatting of the excel table might have something to do with it? Try changing the data type of that column within excel to a numeric type and the bring them back in. It would also be worth inspecting the data type in Arc-Pro by going to the field management. This can be done by opening the table and clicking add field, which will open a secondary table. If the data type is something like "text", then you have likely discovered that the formatting in excel is the issue at hand.
As stated in comments:
That worked! I changed the file type to .xlsx and then ran table to excel.