To configure policy please do the following steps:
Go to Intune Devices -> Configuration page
2. In the opened popup select Platform: Windows 10 and later, Profile type: Settings Catalog
3. Enter profile name and click next
4. On the Configuration settings page click Add Settings. In the opened popup select Google -> Google Chrome -> Extensions settings and select Configure the list of force-installed apps and extensions
5. Close popup by clicking the cross in the top right corner. Selected settings will appear in the list of settings. Enable setting and enter Extension/App IDs and update URLs to be silently installed
Depending on the extension type use the following strings:
Silent extension - nffjckgmpigfpkmamacllkakieaphfnm;https://clients2.google.com/service/update2/crx
Interactive extension - fjambfppaeandondpbbjkggkabeccjmh;https://clients2.google.com/service/update2/crx
6. On the next steps select necessary assignments and create policy