For a practical discussion of how to do a systematic review, see this case study from Jennifer Fane, who used a critical interpretive synthesis approach to integrate inter-disciplinary literature from education and health on ‘school readiness’, which she undertook as part of a PhD. This is a useful account for anyone new to systematic review methods, outlining not only the key tasks and challenges (breadth of literature and theoretical approaches, searching for gaps), but also showing in a practical way how long they took and how they can be met. Fane also reproduces her flow diagram to show the process, and elements of her search strategy, so you can see how these reviews are written up:
https://methods.sagepub.com/Case/srmpromo/PDuI8U/qualitative-systematic-review-interdisciplinary-childrens-health-school