Navigating AML flags for new crypto payment rails

We're exploring integrating a new suite of crypto payment rails for our international clients, specifically targeting stablecoin settlements. The efficiency gains are clear, but the AML risk profile feels more ambiguous than traditional wire transfers. Beyond the usual source of funds checks, what specific red flags are you seeing emerge in the stablecoin space, especially when dealing with smaller, less-established counterparties? Any particular regulatory guidance (beyond FATF's general recommendations) that has proven particularly insightful for the APAC or EMEA regions?