We aren't Apple employees here, and we have no influence on Apple. We're just volunteering to share what we know. If you are convinced that no changes within the boundaries of what Pages, or Numbers, can do are going to be acceptable, then we can't help.
Things you can do to squeeze the maximum Table content into a page are:
Resize the columns to give the ones with the most content the most space.
Shrink the Document Margins
Decrease the Print Zoom setting, or Use Smaller fonts
Try U. S. Legal, if your printer supports it.
Think about using Landscape Orientation.
If you're not going to print to paper, change your document size to whatever works. (About the same as changing the zoom.)
Starting a question of your own can be effective because the different Problem Description may attract someone with a better answer.
Best,
Jerry