KYC/AML for cross-border payments with crypto on-ramps

Curious how others are handling the KYC/AML complexities for platforms facilitating cross-border fiat-to-crypto and crypto-to-fiat transactions. Specifically, when dealing with multiple jurisdictions for both the sender/receiver and the exchange/platform itself. The varying regulatory landscapes for virtual asset service providers (VASPs) are a minefield. Are you leveraging specific regtech solutions or building custom frameworks? What are the biggest red flags you're seeing for AML concerning these flows? Seems like a prime area for FinCEN and other bodies to zero in on.