If you have enabled PayPal Standard on your Website but PayPal is not showing up as an option for your customers when paying with a payment plan, make sure that you have enabled PayPal Standard for Subscriptions. To do this:

1. On your WordPress dashboard, hover over WooCommerce and click Settings.
2. Click on the Payments tab and then Manage in the PayPal Standard row.
3. Turn on Enable PayPal Standard for Subscriptions.
4. Scroll to the bottom of the page and click Save changes.