Trackpad / touchpad isn't disabled or have palm rejection when using keyboard

It's in the settings, but I'm frequently typing and the fat drumstick of my thumb grazes the touchpad and it repositions where the cursor is (or worse).

Start by inspecting the repository for settings or configuration related to the touchpad and keyboard interaction; no file or test is named in the issue. Reproduce the cursor movement while typing, then determine whether the expected behavior is disabling the touchpad or adding palm rejection. Done means the unwanted touchpad input no longer affects typing, with the chosen behavior documented or tested.

Written by the indexing model from the issue text.