I have the following code:
df, err = ek.get_data(
    instruments = ['ONGZ2'],
    fields = [
        'TR.CLOSEPRICE(Frq=D,SDate=2021-07-01,EDate=2022-07-20)',
        'TR.OPENINTEREST(Frq=D,SDate=2021-07-01,EDate=2022-07-20)'
    ]
)
display(df)
This plots the data range specified but doesn't show the respective date. How can I get the date data as well here?