Sharepoint administration not showing migrated site?

We migrated from google workspace to microsoft 365 and the files transferred correctly, but they are not showing up if you try to navigate to them and the migrated site usage is not showing up in sharepoint administration.

So migrated files are in:

https://(companyname).sharepoint.com/sites/contentTypeHub/SitePages/Kotisivu.aspx

and if I navigate to that page I can then work with the files just fine.

But I would want to both set it as default for people and to manage it from the admin center.

The admin center just shows 

https://(companyname).sharepoint.com/

and it is just using 0.01gb despite migrating several gigabytes from Google.

Also in the " SharePoint Home site" setting it says that site not found when I try to set the site as home site.

and going to https://(companyname).sharepoint.com/ Does not allow finding the files. 

So how do I integrate the migrated site to the admin center?