Hi @3dwan,
Thank you for your question. The SimplyBook.me plugin is a standalone integration, allowing you to easily embed and configure the SimplyBook.me booking widget directly on your WordPress site. The plugin does not directly connect to WordPress or WooCommerce’s user authentication or payment systems.
Instead, payments are handled through your SimplyBook.me account, where you can set up your preferred payment providers (see: https://simplybook.me/en/accept-payments-through-your-booking-page)
Let us know if you have any further questions!
Kind regards, Jarno