Subscription status in the DB not updated with Stripe - laravel

Question

I'm approaching Stripe and Laravel for the first time. In my application I used the following code to manage payment rejections:
public function processSubscription(Request $request) {
$this->validate($request, [
'token' => 'required',
'plan' => 'required'
]);
try {
$stripeCustomer = Auth::user()->createOrGetStripeCustomer([
'description' => 'Example Example',
'email' => Auth::user()->email,
'name' => 'Example Example',
'phone' => '322234455556',
'address' => [
'city' => 'Alcatraz',
'line1' => 'Via Dalle Palle',
'postal_code' => '96011',
'state' => 'Italia'
]
]);
Auth::user()->newSubscription('default', $request->input('plan'))->create($request->token);
return redirect()->route('index')->with('success','Your subscription is active.');
} catch (IncompletePayment $exception) {
return redirect()->route(
'cashier.payment',
[$exception->payment->id, 'redirect' => route('index')]
);
}
//catch(\Stripe\Exception\CardException $e) {
//return back()->withErrors(['message' => 'Error creating subscription. ' . $e->getMessage()]);
//}
}
During a test payment, using the card:
4000 0000 0000 0341
A page is opened to confirm the customer's data again, this time by inserting a valid card (4242 4242 4242 4242), the payment is correctly executed and unfortunately nothing has changed by returning to the home page.
The status of the customer's subscription remains "incomplete".
I also attach the javascript code if anything could be useful.
const stripe = Stripe('{{ config('cashier.key') }}')
const elements = stripe.elements()
const cardElement = elements.create('card')
cardElement.mount('#card-element')
const form = document.getElementById('payment-form')
const cardBtn = document.getElementById('card-button')
//const cardHolderName = document.getElementById('card-holder-name')
form.addEventListener('submit', async (e) => {
e.preventDefault()
// Disable the submit button to prevent repeated clicks
document.getElementById('card-button').disabled = true
const { setupIntent, error } = await stripe.confirmCardSetup(
cardBtn.dataset.secret, {
payment_method: {
card: cardElement,
//billing_details: {
//name: document.getElementById('name').value
//}
}
}
)
if(error) {
document.getElementById('card-button').disabled = false
} else {
let token = document.createElement('input')
token.setAttribute('type', 'hidden')
token.setAttribute('name', 'token')
token.setAttribute('value', setupIntent.payment_method)
form.appendChild(token)
form.submit();
}
})
Why is the subscription status in the database not updated after the first payment fails, but the second payment does?