The unique values in two or more fields are categorized as 'all other values' in ArcGIS Online.

Solução Provisória

For the counting and categorization, create the following expression in ArcGIS Online:

This displays the categorization as it is in ArcGIS Pro, but without the labels.

Note: Whenever the name of each category is changed, the value of the first field of the relevant records is changed.

Etapas para Reproduzir