In GridFilterControl, by default, the items will be loaded inside the CheckBoxFilterControl based on the display text of FilterElement. However, you can change the display text of CheckBoxFilterControl in FilterItemsPopulated event.
Due to performance reasons SfDataGrid creates filter predicates based on checked and unchecked items count (which count is less). However, you can change the filter predicate based on your display text in FilterChanging event.
Please refer the below code example for more details.
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