Uterine leiomyosarcoma with lung metastasis: Treatment options?

Dec 2023 10cm fibroid that by March 2024 resulted in full hysterectomy and uterine leiomyosarcoma diagnosis. May x-ray clear however new Oct CT 5months shows 35 lung lesions. Some 1x2 cm. Bloodwork normal. Lung function exactly the same. I feel fine -but apparently I'm not. Is anyone familiar with leiomyosarcoma metastasizing to the lungs ? Has it been that fast? What options are available ? Is there any new research that is promising ? Why do I feel fine ? What else can I do?