Here are some links. The Phys. Rev. Lett. articles are paywalled, so I've also linked to the arXiv.
"Test of the Gravitational Redshift with Galileo Satellites in an Eccentric Orbit", by Sven Herrmann et al., https://doi.org/10.1103/PhysRevLett.121.231102 https://arxiv.org/abs/1812.09161
"Gravitational Redshift Test Using Eccentric Galileo Satellites", by P. Delva et al., https://doi.org/10.1103/PhysRevLett.121.231101 https://arxiv.org/abs/1812.03711
Is the slowing down of time just simply the fact that all matter has some sort of core weight that has more/less friction when under the pressure of gravity?
(paywall, but nice summary in the non-paywalled abstract)