No, we can't calculate the work item's age using work item query. But you can try to calculate work item age with reporting or TFS API, then create chart based on these available work item age data.
For getting the work item's age with Custom Reports you can reference these articles:
And another similar thread talking about the work item age for your reference:
How to get the time between two TFS Work Item States in SSAS (or any other report)?
Besides, you can try querying from database directly to get the start date, then calculate the number of days for the work items with 'In Progress' state, something like this:
SELECT
System_WorkItemType
,System_Title
,System_State
,System_CreatedDate
,DateDiff("DAY",System_CreatedDate,GETDATE()) as Age
FROM [Tfs_Warehouse].[dbo].[DimWorkItem]
WHERE System_State = 'In Progress'