Starting with the release of Strategy ONE (March 2024), dossiers are also known as dashboards.
SYMPTOM:
Multiform attribute cannot be displayed in ESRI map on Strategy Web 10.X as seen below:

STEPS TO REPRODUCE:
1. Build an attribute with multiple forms, one ID form and one with Geography elements like country names
2. Add this attribute into ESRI map visualizations in VI dashboard or Dossier, no markers or areas are displayed on the Map
CAUSE:
For a normal multiform attribute, the first attribute form will be taken as the geography attribute. Sine the first attribute form is always the ID form with elements of numbers, it cannot be displayed on ESRI map.
WORKAROUND:
Users can take either of the following methods to avoid this issue:

KB442330