Wikivoyage pagebanners have a unique Table of Contents showing only level one headings(horizontally), giving them a distinctive appearance, as shown below:
However, there may be need to pack in more content, in sub-headings, for which there is a proposal to add drop-down links to the prominent horizontal TOC, in the pagebanner extension being developed.
Relevant discussions on wikivoyage are:
Full TOC button
While the task of creating banners is ongoing at T94772, it'll be better to discuss and finalize the nature and appearance of drop-down TOC, early on.
The initial idea as in the proposal at T93106 is to generate headings beyond level 1 as simple drop-down menus, of the horizontal TOC
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