RecruitingPhase 2Drug trialTherasphere® and Systemic Therapy for Patients With Hepatocellular Carcinoma That is High-riskThe purpose of this research is to compare progression free survival between two available systemic therapies - immunotherapy and tyrosine kinase inhibitors - after Therasphere® (yttrium-90) treatment in adult patients with advanced hepatocellular carcinoma. The immunotherapy consists of a standard-of-care treatment with Atezolizumab and Bevacizumab. Treatment with tyrosine kinase inhibitors consists of standard-of-care Lenvatinib or Cabozantinib.