Wikivoyage's use of RelatedArticles predates the reboot done by the reading web team. They have been using the extension to manually curate lists of related articles on a variety of pages. For instance on the page Japan:
{F8454356}
For the community to adopt the new version of the extension which shows cards in the footer, on Wikivoyage it should be possible to have more than 3 related pages using the RelatedArticles extension so that it doesn't hide content they've already provided.
On https://en.m.wikivoyage.org/wiki/Japan for example there are 5 related pages. All 5 should be shown.
= Appearance
3
{F8398292}
4
{F8398291}
5
You get the idea
= Acceptance criteria
[] The RelatedArticles extension has a configurable limit which defaults to unlimited
[] The limit is disabled on Wikivoyage projects
[] The limit is 3 on all other projects