I'm currently working on T240232: Provide best practices concerning writing help pages on wikis. So far, the comparative review I've made (T238784) shown that providing help for different cases is nicely done using tabs. This is what Medium, Google or Slack use them to detail how to use their services for instance on Android or iOS.
I'm currently working on T240233: Apply best practices to a subset of pages on Growth target wikis, I started with How to add a citation. I developped some sub-sections on this page to list the different cases for VE, Wikitext, mobile... I just miss the tabs now. :)