Terraform is an opensource Infrastructure as Code (IaC) tool.
It is agentless. You only have to install the tool locally and provide access credentials to connect to your backend.
One of Terraform's biggest advantages is that it can manage infrastructure on multiple cloud platforms.
For a quick walkthrough how to create AWS Lambda Function URLs using Terraform read https://nquayson.com/aws-lambda-function-url-using-terraform-quick-walkthrough