@Elliot Stansfield Probably your question or ask is not clear !! But based upon your requirements it's not possible. You can't just create a container out of Azure SQL DB .
ACR is mainly used to store the container images through which a container can be created.
If you want to deploy a SQL Server as a container in AKS you can use the steps mentioned below:
-> Create a Persistent Volume (To store the data in azure disk)
-> Create a pod by using sql server Image: mcr.microsoft.com/mssql/server:2019-latest
-> expose the pod using a service
-> You can connect to that containerized pod using SQL server management studio using the serviceIP.
Regards,
Shiva.