Numbers - How to print one page macOS ?

While I appreciate the obfuscation of your spreadsheet data, it does look to me like your content extends past one page. Specifically, it looks to me like at least the center page, and the middle-bottom page have content on them.

That indicates to me that your sheet does, indeed, take up that much space, and hence will print across multiple pages.

The question, therefore, is what content is on those pages? Did you move some tables 'off screen' so that they wouldn't be visible? that's not the best way to prevent them from printing. For that you should move them to a separate sheet within this document. That way they are still reference-able, but not visible, and won't impact the printing.

After File > Print try reducing Content Scale.

SG