Mat-icon doesn't export in excel sheet?

Question

I have used mat-icons to show in table in my project. but while exporting table to Excel or CSV changes to mat icon name instead of icon. I have attached code and image for more understanding.

mat-icon code

 <i class="material-icons col-green">arrow_upward</i>

I have also tried with

<mat-icon class="col-green">arrow_upward</mat-icon>

here's my export table code

exportTable(fileType = "xlsx") {
    this.matTableExporter.exportTable(fileType, { fileName: this.tabData.title, sheet: this.tabData.title });
}