is there any way to integrate with https://github.com/hashicorp/terraform-cdk at this point?

I haven’t looked enough into this. Are you looking to deploy something into other cloud providers?

not really. One of my clients has their whole infra defined in TF, so I was trying to see if there could be a case for migrating some of their serverless to use SST/CDK because of the nice development experience, but maintain their TF resources