Your files are long, involve several countries and need careful document control. We focus the first release on the stakeholder workspace, document requests with legalisation guidance, and the linked entity tracker. Reporting for the client's group legal team usually comes next, because they want a single view across every jurisdiction they are opening in. Group legal teams in Europe, Asia or North America also expect formal audit trails, so every approval, upload and change of scope is recorded with the user and time. Your partners can export that record whenever the client's compliance team asks for proof of who approved what.
Start with the document flow, since that is where these mandates stall.