You can create a step that exports data as CSV (or any other format) by defining a custom function.

For example, here is a function that exports the step data as data_out.csv file under my Downloads folder.

export_as_csv <- function(df) {
  readr::write_delim(df, path='/Users/hideaki/Downloads/data_out.csv',
                     append=FALSE, col_names=TRUE, delim=',')

Create a Script and paste this function, after adjusting the output file path to suite your environment.

Now, you can call this function as a custom step like following.

Each time this step is executed, the data will be written out as CSV file.