Pivot table , Date hierarchy

Hi,
I would like to show the folliwing in a piovt table


2020 Nov / Dec

2021 Jan / Feb

so using filter ;

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I have tried using advanced filter also but not sure about how, but my main is the pivot, I have attached the above and a pivot with
a date hierarchy showing the dates required but it is also show all the other months I don't want to see, help?

Richard