Can't convert a axis label with callback function (:

[balamurugan-tealvue]

const valueFormatter = async(value: string) => { return (Number(value)/1000000)+'Cr'; }

xAxis: { type: 'category', boundaryGap: false, data: chartData?.equity_data?.map((data: any) => moment(data[1])?.format('HH:mm')), axisLabel: { formatter: valueFormatter , }, },