See this @brennancenter.org resource with 57 constitutional law scholars and retired federal and state judges who affirmed Congress’s power to pass such a law establishing Supreme Court term limits.
brennancenter.org
Letter to Congress - Constitutional Scholars and Retired Judges Ask Congress to Pass Supreme Court Term Limits
Dozens of constitutional scholars and former state and federal judges affirm the constitutionality of term limits for U.S. Supreme Court Justices