petri[.]com/understanding-user-settings-and-data-synchronization-in-chromium-based-microsoft-edge
Copy/paste edge://settings/profiles in the address bar to access. Once there, besides adding accounts, you can manage the account, set what syncs with other copies of the browser using the same account, add/manage passwords & payment info, set, access & manage form data, e.g. addresses, and import data from another browser.