Coming out of a short discussion in Discord, here's a feature request. While expands are great, as it is not recommended to put other types of blocks inside an expand block, more block types should offer an expand feature.
Expands are practically (at least from my side) used to hide big chunks of information. As we shouldn't put stuff like tables or probably also callouts into expands, it would be great to have the ability to put an expand feature on these types of blocks (maybe also subpage indexes, ToCs, Tag Indexes, etc.) to have the function without having to use a hacky solution