Azure Databricks mounts create a link between a workspace and cloud object storage, which enables you to interact with cloud object storage using familiar file paths relative to the Databricks file system. Mounts work by creating a local alias under the /mnt directory. Taking into account that no limit on that topic is listed in https://learn.microsoft.com/en-us/azure/databricks/resources/limits, normally, you can create as much mount points as you want.

However, there is no support for mount points with Unity Catalog. Existing mount points can be upgraded to External Locations using the wizard in Data Explorer - take this point into account while designing you final solution.