KYC/AML and Market Expansion in Neighboring Countries: Challenges and Adaptations

I'm currently considering expanding services into the CLMV group. Primarily, this will involve Payment Processing and FX, with plans to focus mainly on $THB and $USD. Of course, KYC/AML procedures vary significantly across different jurisdictions, especially regarding identity verification documents and source of funds. I'd like to ask friends with direct experience if there are any interesting frameworks or playbooks for designing scalable KYC/AML processes that don't overly impact user experience and also comply with the regulations of each country. Are there any points we might be overlooking besides the general basics?