Is having a mutation vital for cure

[catlady91]

My mum was diagnosed with stage 3B squamous cell non-small cell lung cancer in Feb. She's doing well; she finished her chemo and radiotherapy a while ago and recently started immunotherapy. My mum's biomarkers showed that she has PDL1, which is why they approved her for immunotherapy. A lot of people talk about mutations, but apparently squamous cell doesn't tend to have any mutations. My mum is EDGF wildtype which means that she doesn't have that mutation. Is this a bad thing when it comes to trying to cure or to treat lung cancer? Does having mutations mean that there's more of a chance for cure?