Using secret store csi driver with third party helm charts

[chopraaakash91]

Hi Team, I am deploying enterprise applications like gitlab and Jfrog artifactory using helm charts on Azure Kubernetes Service. Gitlab and artifactory use a postgress DB to store metadata information. As of now, I have created a kubernetes secret for postgres user and pwd and passing that secret to helm chart using values.yaml. But that secret is not secure as it is simply base64 encoded. If i were the owner of these applications, I would have easily integrated this secret store CSI driver as I could have modified the deployment.yaml to mount the secrets. What should I do in this case where i can't modify the deployment.yaml spec and deploying third party apps using Helm ?
Kindly Assist.