Study Comparing BGB-B2033 With Sorafenib or Lenvatinib in Relapsed Hepatocellular Carcinoma

The goal of this clinical trial is to learn how well BGB-B2033 works and how safe it is in people with hepatocellular carcinoma (HCC) who have previously received up to two treatments that included programmed cell death protein 1 (PD-1)/programmed death ligand 1 (PD-L1) medicines. Researchers will compare BGB-B2033 with either sorafenib or lenvatinib chosen by the study doctor to see which treatment works better and is safer. The main questions it aims to answer are: * Does BGB-B2033 help control or slow the growth of liver cancer? * What medical problems or side effects do participants have while taking BGB-B2033? * Does BGB-B2033 help to prolong the survival for liver cancer participants over Lenvatinib/sorafenib?