<mat-form-field hintLabel="Minimum 8 Characters" class="">
                            <mat-label>Password</mat-label>
                            <input
                            matInput
                            #input
                            type="password"
                            formControlName="password">
                            <mat-hint align="end">{{input.value?.length || 0}}/8</mat-hint>
                        </mat-form-field>

                        <mat-form-field>
                            <mat-label>Confirm</mat-label>
                            <input
                            matInput
                            required
                            type="password"
                            #confirm
                            formControlName="confirmPassword">
                            <mat-error *ngIf="form.get('confirmPassword').invalid || confirmPasswordMismatch">Password does not match</mat-error>
                            </mat-form-field>

public get confirmPasswordMismatch() {
        return (this.form.get('password').dirty || this.form.get('confirmPassword').dirty) && this.form.hasError('confirmedDoesNotMatch');
    }

this.form = new FormGroup({
            userName: new FormControl(null, [Validators.required]),
            fullName: new FormControl(null, [Validators.required]),
            email: new FormControl(null, [Validators.required, Validators.pattern(this.EMAIL_REGEX)]),
            password: new FormControl(null),
            confirmPassword: new FormControl(null, ),
        }, (form: FormGroup) => passwordValidator.validate(form));