How multiselect field default value set in report

{
“fieldname”: “status”,
“label”: __(“Status”),
“fieldtype”: “MultiSelectList”,
“width”: “80”,
“default”: “To Deliver and Bill”,
get_data: function(txt) {
let status = [“To Bill”, “To Deliver”, “To Deliver and Bill”, “Completed”]
let options =
for (let option of status){
options.push({
“value”: option,
“description”: “”
})
}
return options
}
},

i tried this but not working

Please check the reference:

frappe.query_reports = {
“filter” : [
{

    }
],
// after this
onload: function(report) {
		let status_filter = report.get_filter('status'); // ('feild name')
		if (status_filter && (!status_filter.get_value() || status_filter.get_value().length === 0)) {
			status_filter.set_value(['To Deliver and Bill']);
		}
	},

};