Netezza migration to Azure Synapse - Stored Procedures?
Azure Synapse Pathway is a new tool currently in preview which can look at existing Netezza code for you, attempt to convert it and flag up errors.
Download the tool and run it against your Netezza installation.  Start here:
https://docs.microsoft.com/en-us/sql/tools/synapse-pathway/azure-synapse-pathway-overview?view=azure-sqldw-latest
As a wizard, it's probably at best going to give you 80/20, but will at least offer a start.