Shifted and combined CCFs for TOI-1518 b for Ni I (top row), Fe II (middle row), and Mg I (bottom row) for only the 2023 November 6 observations (left column) and for the combined data sets (right column). The data for Fe II use both PEPSI arms, while those for Ni I and Mg I use only the red arm. The detection strengths decrease in the combined data, perhaps indicating a changing signal strength between the two data sets. See the main text for further discussion.