Navigating AML flags for new Asian fintechs

For those dealing with the newer fintech startups emerging from Southeast Asia, particularly in the payments space, what are the most common AML red flags you've encountered with their initial customer base or transaction patterns? Jurisdictional differences in reporting thresholds or expected due diligence seem to create some friction, and I'm curious how others are managing that in practice. It's a rapidly evolving landscape, and staying ahead of potential issues is key.