What treatment options could patients who relapse after later line CAR-T cell therapy consider? early line CAR-T cell therapy? both CAR-T and BsAbs?

What treatment options could patients who relapse after later line CAR-T cell therapy consider? early line CAR-T cell therapy? both CAR-T and BsAbs?
BETA - What testing is done prior to CAR T-cell therapy? Why is this testing done?
Upfront CAR T-Cell Therapy to Upgrade Response in Myeloma. Sergio Giralt, MD | #ASH2025
BETA - Where can people go to get CAR T-cell therapy?