Stacked column chart with text as data labels

oslosa ,

You may use "Group by" feature in query editor(the transform panel) to achieve the count of  each group, then apply the modification and drag the new column to the legend field in the stack bar visual.

Or create a calculate column using dax expression.

Group Legend =
CALCULATE (
    COUNTROWS ( Table ),
    FILTER ( Table, Table[Category] = EARLIER ( Table[Category] ) )
)

Community Support Team _ Jimmy Tao

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.