They could released a Chrome extension to let users configure their links for each of those apps. Wasted effort.

This app isn't just some link aggregator or an admin dashboard, though. It's workplace software that hosts all your data, self-hosted on your system of choice if you wish. I'm neither a user of nor am I affiliated with this project, but it seems like there's the aspiration to provide a unified client interface for every app, and it looks like you could BYOC as well (for CalDAV and Email).