“…Moderate youth engagement was identified in six interventions (8%) whereby youth, under supervision, were empowered to decide how to deliver intervention components, implying shared decision making with adults (Video S1 abstract) [22‐27]. Most interventions (48, 65%) had minimal engagement, with youth having no decision‐making power [28‐65,67‐72,75,87,90,130], and some interventions (17, 23%) had no engagement at any phase of research [66,73,74,76‐86,88,89,129].…”