"Azure Data Lake Storage Gen2 is a set of capabilities dedicated to big data analytics, built on Azure Blob Storage."
Source: https://docs.microsoft.com/en-us/azure/storage/blobs/data-lake-storage-introduction
Using ADLS Gen2 requires creating and Azure Storage Account with specific settings.
This can be done via an ARM template or via the Azure Portal.
Docs: Microsoft.Storage/storageAccounts - Bicep & ARM template reference | Microsoft Docs
The critical part for creating an ADLS Gen2 Storage Account via ARM are the following properties:
kind = StorageV2isHnsEnabled = true
Docs: Create a storage account for Azure Data Lake Storage Gen2 | Microsoft Docs