What imports an unreal engine from FBX?

What imports an unreal engine from FBX in addition to the declared data?
I mean information about the time of creation, the path of the original file, the version of the export fbx and other.
Is the unreal engine just importing data or compiling it into its own format?
If he imports them, then how long does he keep them?
Is this data saved when compiling the final product?

An FBX typically contains some default metadata such as CreationTimeStamp, Author, Directory Path in the drive where it was created, etc. It can also have custom user-made metadata per object which will also be imported (more info). You can check this yourself simply by opening an FBX using a text editor like Notepad++

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What is unrealistic with data when building a project? Throws or reproduces in the game?