Solved
Template Folders not visible on Templates page at /libs/wcm/core/content/sites/templates.html/conf in AEM Cloud Envs(Dev, Stage, QA, & Prod).
I can navigate to the particular templates folder via Url directly, but Templates does not show the folders. It happens only in Cloud envs.
In my local AEM Cloud SDK, it works fine. What could be the possible reason and how to resolve it?