How can I set the dimension for the period when using mixed data?

dochan
New Member

I created mixed data with GA4 and spreadsheet data, but now I can't set the dimension for the period.
(I can set it when using a single data source.)
※There is a column called 'Order Date' in the spreadsheet, and it contains date data.

How can I set the dimension for the period in the above mixed data?

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