Cross-border KYC for small fiat-to-crypto gateways

Starting to see a rise in smaller fiat-to-$BTC on-ramps/off-ramps, often operating across multiple jurisdictions. The challenge for these smaller entities seems to be maintaining robust KYC/AML without the budget for enterprise-grade solutions. Are there any emerging tools or best practices for cost-effective, scalable cross-border identity verification for these types of operations? Specifically concerned about the varying jurisdictional requirements for UBO and source of wealth documentation, which can be a nightmare to standardize.