When placing an order on the / checkout page in the payment selection block, the idea is to have a checkbox in the style “Save the selected payment method”. I did not find such a setting in the admin. In previous versions of WooCommerce, in theory, such a setting was, perhaps, it migrated to another place in the admin panel.
I used the standard Storefront theme for tests, as there is no problem with the theme code code. Tell me, please, because of what the preservation of the method of payment may not be displayed.
Thanks in advance :)
