Spreadsheet uses "handsontable" library. Read more at: https://docs.handsontable.com/pro/2.0.0/tutorial-introduction.html
You may use CSS (with the use of Custom HTML form element) to add pagination functionality to the spreadsheet. The pagination guide can be found here: https://docs.handsontable.com/pro/2.0.0/demo-paginating.html
Alternatively, if you prefer to use scrolling in the spreadsheet, the scrolling guide can be found here: https://docs.handsontable.com/pro/2.0.0/demo-scrolling.html
Lastly, if your requirements does not involve calculations, you may consider the use of other grid elements available in Joget, e.g: form grid, list grid, advanced grid, grid.
Cheers.
