@Naveen Nagadesi Thanks for the question. Here are the docs/snapshot for Azure landing zone that could help.
A landing zone is an environment for hosting your workloads, preprovisioned through code. Watch the following video to learn more.
https://aka.ms/adopt/landingzone/cafmigrate
https://aka.ms/adopt/landingzone/caffoundation
https://aka.ms/adopt/landingzone/enterprise-scale
https://aka.ms/adopt/landingzone/terraform
We are pleased to announce availability of our new Terraform Module for Enterprise-scale Landing Zones under preview.
Try out the early release and provide feedback:
https://aka.ms/terraform-eslz