The Yandex team has developed free ready-made modules for popular CMS systems and website builders, including Wordpress, Tilda, OpenCart, 1C-Bitrix, Joomla and others.
To connect the module, you need to register in the "Yandex Pay" personal account for business, apply for connecting the "Yandex Pay" and "Split" services, and then install the module through the CMS marketplace.
Modules from "Yandex Pay" allow you to make both full payments with cashback in "Plus" points and payments in installments in "Split", as well as process full and partial refunds.