Scaling KYC/AML with International Expansion - What are the biggest non-obvious traps?

We're starting to seriously explore expanding our trading platform into a few new jurisdictions, mostly EMEA and APAC. We've got a decent handle on the initial licensing requirements and the typical 'table stakes' for KYC/AML, but I'm curious from others who have scaled globally: what were some of the non-obvious, perhaps more subtle, compliance or operational risks you ran into? Specifically, I'm thinking beyond just the obvious red flags – more about the friction points or unexpected regulatory interpretations that really slowed you down or forced a significant pivot in your compliance tech stack or process. Any shared experiences would be really valuable.