When creating a new environment only a few regions can be selected. The West Europe and North Europe regions are not available. If you choose Europe - Default the environment might be provisioned in either West Europe or North Europe. Not knowing which Azure region is used is a problem when you want to export data to the Data Lake. The storage account must be in the same region as the CDS environment. If you have all Azure resources and other D365 environments in another region the data must be transferred between regions for integrations which is slower than having everything in the same region.
There the regions for the D365 HR deployment must be aligned with the Azure regions.