@gamaryanne, I believe @robee @ncteacher @k13 @brittbk may have experience with SBRT (stereotactic body radiotherapy) relative to pancreatic cancer and/or liver metastasis. You might also be interested in this possibly relevant discussion:
- Switching to chemoradiation (Xeloda + radiation): What to expect?
https://connect.mayoclinic.org/discussion/questions-about-chemo-radiation/

Did I understand correctly from your message that radiation is being suggested to reduce inflammation of the liver related to metastatic spread to the liver? It sounds like you're concerned (probably also frustrated) that treatment may be delayed while waiting for insurance approval. Are you in discomfort? How are they helping to manage your symptoms while you wait?