KYC/AML for cross-border PSPs navigating LatAm and APAC

We're currently scaling our payment processing services, particularly eyeing expansion into key LatAm and APAC markets. The diverse regulatory landscapes and varying interpretations of AML directives, especially around source of funds and ultimate beneficial ownership, present a constant challenge. For those operating cross-border PSPs in these regions, what are the most effective strategies you've found for streamlining KYC/AML processes while remaining robustly compliant and avoiding excessive friction for legitimate users? Specifically, how are you handling the interplay between local regulatory mandates and international standards like FATF guidelines, and any particular pain points with correspondent banking relationships given the increased scrutiny?