Can you add PayPal to Apple Pay?

Could you elaborate on the feasibility of integrating PayPal into Apple Pay? Given the widespread use of both payment platforms, it seems like a logical next step for convenience and user experience. However, I'm curious about the technical challenges that may arise, such as data security, transaction processing, and user privacy. Additionally, I'm wondering if there are any regulatory hurdles that could prevent such an integration. Clarifying these aspects would help me better understand the complexities of this potential partnership.