SharePoint Column Formatting

https://pnp.github.io/sp-dev-list-formatting/

Formatting multi-value fields

Column Formatting
- https://docs.microsoft.com/en-us/sharepoint/dev/declarative-customization/column-formatting
View Formatting
- https://docs.microsoft.com/en-us/sharepoint/dev/declarative-customization/view-formatting
Forms Configuration
- https://docs.microsoft.com/en-us/sharepoint/dev/declarative-customization/list-form-conditional-show-hide