Import/export page style from/to another .ods file

I have a certain page style defined in one .ods file. I can view them by pressing either the F11 button or clicking on the appropriate icon.

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Among the page styles defined, I want to export the highlighted page style to another file or import it from another file.

Could you please tell me how I can do this?

I am convinced that there is no direct solution to your problem. There is a way to import/export styles in LibreOffice Writer, but the same method is not applicable at all in LibreOffice Calc. That very probably means that this is not implemented in calc yet (as of LibreOffice 6)