How to pass the dynamic pivot table columns in APEX Interactive grid?

Hello,

I would like to pass the dynamic pivot table columns in APEX Interactive grid.

P1_PIVOT_DATA -> ('SEP-21' SEP,'OCT-21' OCT,null NOV,null DEC,null JAN,null FEB,null MAR...)

(sum(amount) for month IN &P1_PIVOT_DATA.) Piv

The above line is working fine in classic report, but not in interactive grid. How to pass the substitution string/bind variable in the Interactive grid pivot table columns?

Any help greatly appreciated.

Thanks