On my PC using Windows PowerShell I was able to Provisioning a SharePoint Online site using the Office Dev PnP Apply-SPOProvisioningTemplate command, providing the -Path C:\mylocalfolder\myFile.pnp parameter.
But what I want is to apply the provisioning template using Apply-SPOProvisioningTemplate -Path paramter referencing one central .PNP file that I reuse for each site I deploy, e.g. using the -Path https://mytentant.sharepoint.com/sites/SiteCollectionWithAssets/siteassets/myFile.pnp parameter. The myFile.pnp file referenced is stored inside a central location that I use for each site I provision. But this doesn't seem to work.