Below are techiques that allow saved bookmarks to be easily imported to the HUB central area that are stored in other browsers

https://blogs.windows.com/windowsexperience/2017/02/27/windows-10-tip-import-favorites-browsers-microsoft-edge/

Did you know you can easily import your favorite sites from other browsers including Chrome, Internet Explorer and Firefox with just two clicks, and see them organized in the Hub? Hub lets you to access your favorites, downloads, reading list and history all in one place.  To import your favorites, go to the Hub and click Settings on the top right. Select the browser you want to import favorites from and click Import.  All your imported favorites will show up in the Hub under the Favorites section