Patients With Advanced Non Small Cell Lung Cancer With Meningeal Progression After Osimertinib Treatment

This is a clinical trial that aims to test Zorifertinib when used together with a known drug, Osimertinib. The goal is to learn if this combination is safe and works for people with advanced Non-Small Cell Lung Cancer (NSCLC) whose cancer has spread to the membranes surrounding the brain and spinal cord (a condition called leptomeningeal metastases) after being treated with Osimertinib.