How to find Kepler/TESS data
It's usually a good idea to use the main page and follow links there instead of guessing URL; a search for "kepler telescope data" and "tess telescope data" quickly revealed these links:

Kepler: https://keplerscience.arc.nasa.gov/data-products.html which links for some data to https://exoplanetarchive.ipac.caltech.edu/index.html

TESS: https://heasarc.gsfc.nasa.gov/docs/tess/data-access.html

There no general access to derived data needed for a particular publication (though it's good practise and meanwhile becoming more common to offer that in supplementary online data).