Confirm password validation in angular

I have a reset-password form with 2 input fields:

1. New Password
2. New Password (confirmation)

I had to create a validation where "New Password (confirmation) needed to match "New Password" and I made it. When you type in a wrong password in "New Password (confirmation) field, it gives an error and wont let you submit the form until it matches the password in field "New Password".But if I go back and change "New Password" field, "New Password (confirmation) field shows it like they still match even though they arent anymore...So my question is: how can i fix this issue?

Any advice is appreciated

ts file

import { AbstractControl, FormBuilder, FormControl, Validators } from '@angular/forms';
import { AppConfig } from 'src/app/_common/configs/app.config';
import { Component } from '@angular/core';

@Component({
selector: 'app-reset-password',
templateUrl: './reset-password.component.html',
styleUrls: ['./reset-password.component.scss'],
})
export class ResetPasswordComponent {
passwordsMatching = false;
isConfirmPasswordDirty = false;
confirmPasswordClass = 'form-control';
appConfig = AppConfig;
newPassword = new FormControl(null, [
(c: AbstractControl) => Validators.required(c),
Validators.pattern('^((?!.*)(?=.*[A-Z])(?=.*d).{8,99})'),
]);
confirmPassword = new FormControl(null, [
(c: AbstractControl) => Validators.required(c),
Validators.pattern('^((?!.*)(?=.*[A-Z])(?=.*d).{8,99})'),
]);

resetPasswordForm = this.formBuilder.group({
newPassword: this.newPassword,
confirmPassword: this.confirmPassword,
});

constructor(private formBuilder: FormBuilder) {}

onSubmit(): void {
if (!this.resetPasswordForm?.valid) {
return;
}
}

checkPasswords(pw: string, cpw: string) {
this.isConfirmPasswordDirty = true;
if (pw == cpw) {
this.passwordsMatching = true;
this.confirmPasswordClass = 'form-control is-valid';
} else {
this.passwordsMatching = false;
this.confirmPasswordClass = 'form-control is-invalid';
}
}
}


**
HTML**

<section class="h-100">
<div class="container h-100">
<div class="card reset-password-form-card">
<div class="card-body p-5">
<h4 class="card-title fw-bold mb-4">Reset password</h4>
<form class="form" [formGroup]="resetPasswordForm" (ngSubmit)="onSubmit()">
<div class="mb-3">
<label for="newPassword">New password: </label>
<input id="newPassword" type="password"
class="form-control" formControlName="newPassword" #pw>
<div *ngIf="newPassword.invalid && (newPassword.dirty || newPassword.touched)"
class="form-text text-danger">
<div *ngIf="newPassword.errors?.['required']">
Field is required
</div>
<div *ngIf="newPassword.errors?.['pattern']">
Password must contain at least one number, one uppercase and a lowercase letter
and at least 8 characters<br>Password cannot contain whitespace
</div>
</div>
</div>
<div class="mb-3">
<label for="confirmPassword">New password (confirmation):</label>
<input id="confirmPassword" type="password" class="form-control"
[ngClass]='confirmPasswordClass' formControlName="confirmPassword"
#cpw (keyup)='checkPasswords(pw.value, cpw.value)'>
<div *ngIf="confirmPassword.invalid && (confirmPassword.dirty || confirmPassword.touched)"
class="form-text text-danger">
<div *ngIf="confirmPassword.errors?.['required']">
Field is required
</div>
<div *ngIf="confirmPassword.errors?.['pattern']">
Password must contain at least one number, one uppercase and a lowercase letter
and at least 8 characters<br>Password cannot contain whitespace
</div>
<div *ngIf='!passwordsMatching && isConfirmPasswordDirty'>
Passwords did not match
</div>
</div>
</div>
<div class="d-flex align-items-center">
<button [disabled]="!resetPasswordForm.valid" type="submit" class="btn btn-dark col-5 mx-auto">
Reset password
</button>
<button type="button" class="btn btn-light col-5 mx-auto" appBackButton>Back</button>
</div>
</form>
</div>
</div>
</div>
</section>

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