Using filter in a gallery

 Filter(SortByColumns(

    Switch(

        var_SelectedTab,

        1,

        col_inPrepRequests,

        2,

        col_readyRequests,

        3,

        col_activeRequests

    ),

    _sortColumn,

    _sortDirection

) , IsBlank(cmbPlant.Selected.Value) || 'Primary Plant' in cmbPlant.Selected.Value ,

IsBlank(cmbArea.Selected.Value) || 'Primary Area' in cmbArea.Selected.Value,

IsBlank(cmbIssuer.Selected.Value) || 'DuPont work responsible'.DisplayName in cmbIssuer.Selected.Value

)