What is tx plan in case of + metastasis?

Difficult case even in terms of chemotherapy response. We usually use cisplatin, a chemotherapy drug used to treat testicular, ovarian, bladder, head and neck, lung and cervical cancer and now we could use immunotherapy. Not the best result as they could die within a year or few. No indications for any surgeries (many complications, the patient will not live long with the metastasis anyways)