you've forgot to mention that product variants have to be created on "Atributes and Variants" tab, saved, and then linked to recurring plans on "Recurring Prices" tab

We can do this workflow in Odoo following these steps:

1. Create a Recurring product, set the Recurring Prices, and publish it to your website:

2. Now when your customers go to your Shop page, they will be able to select the product and the recurring period:

3. After that they can either enter a new card or use a saved card and check the box to use this card automatically for future payments: