To add to this, if the phantom clicks are indeed primarily happening while typing or otherwise moving your hands near the touchpad, you should check to see if tap to click is enabled. The unintentional clicks that feature produces drives me crazy and I have no idea why it’s always on by default when a physical click or button is always available.
KDE let’s you do that first one, though it’s ctrl+super. It’s one of my favourite lesser known features.