WP All Export detects all ACF fields in the posts you're exporting. To customize your export file, drag fields from the Available Data › ACF section and drop them into the editor on the left.
The following ACF picker fields are available to be exported: Date Picker, Date Time Picker, Time Picker, and Color Picker. Here's more on each field, along with an example of what's exported:
Date Picker: Exports the date in the format d/m/Y, example: 07/05/2021.Date Time Picker: Exports the date and time in the format d/m/Y g:i a, example: 21/05/2021 7:06 am.Time Picker: Exports the time in the format g:i a, example: 3:03 am.Color Picker: Exports the color in its HEX color code, example: #8224e3.