Hi there!
Yes, you can sell on Facebook with Ecwid. To do that, you just need to connect your Ecwid store to your business Facebook page. Once it’s done, the products from your Ecwid catalog will be listed on your business Facebook page and your customers will be able to find them in the Shop tab on the page. To purchase a product, they will need to click on it and then click on the “Check Out on Website” button, then they will get redirected to your website to complete the purchase process and place their order.
Here we have a detailed guide to selling on Facebook: https://support.ecwid.com/hc/en-us/articles/115005892705-Selling-on-Facebook
Please let us know if you have further questions or need assistance, we will be happy to help! You can also contact our support at https://support.ecwid.com/hc/en-us/requests/new