On Amazon Payment Services' Privacy Page you can request and collect all the privacy and GDPR related information that Amazon Payment Services is providing.
The privacy policy by is a legal document or statement that discloses how Amazon Payment Services gathers, uses, discloses, and manges their customers' data.
The basis for Amazon Payment Services sharing, adding, uploading, hosting, accessing or sending personal data out of Europe. Vendors can also add a description of their own impact assessment for data transfers.
Subprocessors are companies that provide a service for Amazon Payment Services and who has or potentially will get access to personal data of their customers.