Hi @SUGANTHI G ,
Thanks for reaching out to Q&A.
You can use the SFTP trigger to poll and use the upload blob action for storage operation. However there is no option to configure SSH using key vault in the SFTP trigger. Only option is to choose the SSH private key.
https://learn.microsoft.com/en-us/azure/connectors/connectors-sftp-ssh#main
You can request for this feature here : https://feedback.azure.com/d365community/forum/cb47c115-7926-ec11-b6e6-000d3a4f032c?filter=top