Collapse filter blocks only support selecting relationship fields and option fields as filter fields.

Configure data scope for relationship fields to limit filterable content.

Example: Filter users whose username contains 'a'.

For more content, refer to Set Data Scope.
Configure the title field of the filter block.
For more content, refer to Title Field.
Set the default expanded state of the filter block, default is not expanded.
Configure sorting rules for relationship data to more precisely control the order of filter results.
You can customize the title of the filter block.