The transactions with blank Dimension Code Value should be displayed under a column named 'Unspecified Dimension' in the Analysis By Dimension Matrix Overview page. Currently these transactions are skipped when Show as Column = Dimension Code.
The Item Availability by Location displays the Inventory for Blank Location Code as 'Unspecified Location'.
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Ideas Administrator

Thank you for this suggestion! Currently this is not on our roadmap. We are tracking this idea and if it gathers more votes and comments we will consider it in the future. Best regards, Business Central Team