This option is only valid for subscriptions that we manage personally. If you receive your invoices from Koober, then you indeed have access to this option.
Make sure you are logged in to your Koober account and then click on: https://koober.com/fr/settings
Click on the "Change my card" button.
Fill in the form and validate
Otherwise, if you don't get invoices from Koober, you’ll have to handle this directly with Apple Pay or Google Pay.