Image Map can be used on any SharePoint site/page, teams, web part page etc. The earlier called SharePoint Hosted Image Maps Addin & Image Map SPFx web part is now combined into a single web part for in place editing & usage.

1. Make sure you’ve Image Map web part properly installed and obtained a valid license.
2. Head towards a SharePoint Page or an App Page and Edit it.
3. Add web part to the page & start editing and save/republish page.

* You cannot create or edit a New Image Map in Microsoft Teams – you can only display any existing Image Maps that have already been created via the associated SharePoint site.