I have done some text replacements and customizations for some of the content on landing pages. How do I put the same customization into production ??
I’m not aware of any tools to do that. Since making those changes is very safe, most people just make them directly on the production server.
You could contrive to use the API to identify and download them from the one server and then use the API to push them to production. Unless you made dozens or hundreds of them its likely not worth it.
Another way, I think, would be a plugin that does nothing but override them.