mat stepper change stepper icon code example

Example 1: mat stepper custom icon edit

<mat-vertical-stepper>
  <ng-template matStepperIcon="edit">
    <mat-icon>insert_drive_file</mat-icon>
  </ng-template>

  <ng-template matStepperIcon="done">
    <mat-icon>done_all</mat-icon>
  </ng-template>

  <!-- Custom icon with a context variable. -->
  <ng-template matStepperIcon="number" let-index="index">
    {{index + 10}}
  </ng-template>

  <!-- Stepper steps go here -->
</mat-vertical-stepper>

Example 2: mat stepper custom css

/** custom CSS as per your :required */
::ng-deep .mat-horizontal-stepper-header {
    box-sizing: border-box;
    flex-direction: column-reverse !important;
    height: auto;
    padding: 24px;
}
::ng-deep .mat-horizontal-stepper-header .mat-step-label {
    padding: 0px 0px 16px !important;
}
::ng-deep .mat-stepper-label-position-bottom .mat-horizontal-stepper-header:not(:first-child)::before, ::ng-deep .mat-stepper-label-position-bottom .mat-horizontal-stepper-header:not(:last-child)::after{
    top: 68px !important;
}