This sounds like a configuration issue with your homepage. It could be only displaying posts from a certain category or author or only certain posts.
We really need to know much more as follows to help you as a million reasons could be causing this.
1. Have you changed any of the default options for Frontend and WordPress?
2. Is your home page customized or does it just use the default theme settings.
Also please provide the following details
Server
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FrontEnd Version
WordPress Version
WordPress Theme
Versions of all other installed WordPress plugins.
error messages
We also need a link to your home page so we can see what you are talking about.