@Mike P Welcome to Microsoft Q&A Forum, Thank you for posting your query here!
Azure Blob Storage is the only storage platform that supports SFTP over object storage natively in a serverless fashion, enabling you to leverage object storage economics and features. With multi-protocol support, you can run your applications on a single storage platform with no application rewrites necessary, therefore eliminating data silos.
Supporting both NFSv3 and SFTP on blob accounts is a post GA item. Can you please explain scenario more on syncing files with on-prem using SFTP?
Azure SFTP - Approaching GA I would recommend to please fill up the form here
Please let us know if you have any further queries. I’m happy to assist you further.
----------
Please do not forget to and “up-vote” wherever the information provided helps you, this can be beneficial to other community members.