The automated installation test provides the errors that need to be corrected in the technical report. The technical report can be view/downloaded under the product submission.
The following link will guide with installation issues:
Varnish Cache test is required for Commerce Cloud. To resolve these types of issues, please reference the following links:
Please note that the following is no longer an acceptable exception:
If an extension has a customized sitemap creation/generation flow, the sitemap can’t be created/generated using standard Magento routes.
Solution: In this instance, the extension will have to be reviewed manually.