When exporting a CSV data file, repeatable and table question responses will be included in a supplementary CSV file.
Within the data file, the value of the repeatable question will indicate the corresponding CSV filename. For example,
3_202001290003_187_data_1812.csv is shown in the screenshot below.
The associated file will contain the responses to the question.
XML & JSON exports
XML and JSON formats allow repeatable and table questions to be included within the data file and these formats do not have supplementary data files for repeatable and table questions.