SharePoint URL Assign

In our SharePoint online can we change the default site collection URL?

We have two SharePoint site collections :

1. TeamsiteA - https://companyname.sharepoint.de
2. TeamsiteB - https://companyname.sharepoint.de/sites/team

But now we would like to change TeamsiteB as a default site

When we enter the URL https://companyname.sharepoint.de it should point the TeamsiteB

how can we do this?