The objective of this research was to conduct a systematic review of systematic reviews related to Article 12 of the UN Convention on the Rights of the Child (UNCRC) as it relates to children and young people involved with child welfare agencies. This systematic review sought to comply with the guidance from the JBI Manual for Evidence Synthesis on umbrella reviews. Fourteen databases were searched using predefined terms. Six hundred seventy-four original hits were retrieved for title and abstract searching after independent searching by the authors. Of those, fourteen were included for full independent reads and all fourteen were selected after discussion. Each systematic review was appraised using an eleven-point quality checklist from JBI. A thematic review was conducted to ascertain the themes across all systematic reviews. Three themes emerged (i) children’s voice is not taken seriously; (ii) relationships are an important determining factor in (un)successful participation; and (iii) the context of participation is important. Our conclusion is that despite mandated UNCRC requirements to involve children and young people within the child protection system, the possibilities for children and young people to express their views remain restricted.