What systematic reviews are NOT are literature reviews. They avoid cherry picking individual studies – consciously or not – that fit a preconceived idea or narrative. This attempt at comprehensiveness is important for policy: where research summaries on issues of national importance should avoid bias towards some studies and the exclusion of inconvenient research.
— Read on blogs.lse.ac.uk/impactofsocialsciences/2022/04/27/quick-but-not-dirty-can-rapid-evidence-reviews-reliably-inform-policy/
A great list of research appraisal tools compiled by the Centre for Allied Health Evidence at the University of South Australia on different approaches to critical appraisal, from systematic reviews to qualitative methods.