Why does only the show() operation show up in the spark ui?

Question

I currently have a project using spark. For this project we are calculating some averages on a DataSet as follows:

public void calculateAverages() {
    this.data.show();
    String format = "HH";

    // Get the dataset such that the time column only contains the hour. 
    Dataset<Row> df = this.data.withColumn("Time", functions.from_unixtime(functions.col("Time").divide(1000), format));

    df.show();

    // Group rows by the hour (HH).
    RelationalGroupedDataset df_grouped = df.groupBy("Time");

    // Calculate averages for each column.
    Dataset<Row> df_averages = df_grouped.agg(
            functions.avg(column_names[0]),
            functions.avg(column_names[1]),
            functions.avg(column_names[2]),
            functions.avg(column_names[3]),
            functions.avg(column_names[4]),
            functions.avg(column_names[5]),
            functions.avg(column_names[6])
        );

    // Order the rows from 00 to 24. 
    Dataset<Row> df_ordered = df_averages.orderBy(functions.asc("Time"));
    
    // Show in console. 
    df_ordered.show();
}

Here this.data is defined as Dataset<PowerConsumptionRow> data where PowerConsumptionRow is a custom class.

For this code I was expecting the operations groupBy, agg and orderBy to show up as stages in the spark user interface. However, as can be seen below, only the show() operations are showing:

Is there a reason why these operations are not showing up ? The operations are all performed successfully since the output of show() is correct.