Cross-border KYC for non-bank fintechs

Seeing an increasing push for non-bank fintechs operating across multiple jurisdictions to streamline their KYC/KYB processes without sacrificing compliance robustness. Specifically, what are some practical, non-vendor-specific challenges or emerging best practices for consolidating identity verification and beneficial ownership information when dealing with disparate national registries and varying data privacy regulations? It seems the one-size-fits-all approach is becoming less viable, particularly when scaling. I'm less interested in theoretical frameworks and more in on-the-ground operational headaches and solutions.