Insert > Manual Break… > Type of “Page Break” > Style of “No header / footer” > click OK. Place the cursor at the end of the content on the page prior to the page to have no header / footer. 
Organiser tab > give this new style a meaningful name (e.g., “No header / footer”) > set Next Style to “Default Style”. Create a new page style based on the Default Style page style (right-click > New…). If the Default Style page style has been used throughout a work and this style edited to display the header / footer area, then this process will work: I recommend referring to the Writer Guide v4.0 Working with page styles, pp.221-228. 
There is no manner of suppressing header / footer areas on arbitrary pages without using page styles e.g., Format > Styles and Formatting > select Page Styles icon at top:
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