I work on a model driven power app and created charts of type tag chart with the standard functionality. If the text of a tags is longer than 8 characters, they are cut off in width.
The appearance of charts can be customized in the chart XML file. I try to find out which property needs to be modified or added to fit the tags to the length of the text, see code sample below.
{my_VisualizationID}
Content Group
null
my_table
/_imgs/case_mix_by_product.png
false