Does Juan have a right to file a supplemental brief?

Juan's court-appointed attorney filed a brief raising no issues and asking this court to conduct an independent review of the record pursuant to People v. Wende (1979) 25 Cal.3d 436. Juan was advised of his right to file a supplemental brief by his attorney and filed no supplemental brief. This court reviewed the entire record, as supplemented by a transcript of proceedings determined to be missing from the record originally transmitted to this court,¹ directed supplemental briefing on a limited number of questions, and we now affirm.