Get this structure from magento2
in to the o-header.vue
In the products page
the category is shown, but not in the navigation links
config.json
“filterFields”: {},
“breadcrumbFilterFields”: {},
“categoriesRootCategorylId”: 2,
“categoriesDynamicPrefetchLevel”: 2,
“categoriesDynamicPrefetch”: false,
“validSearchOptionsFromRouteParams”: [
“url-key”,
“slug”,
“id”
]
Hey, I believe it’s breadrcumbs on screen, not o-header 
In src/themes/capybara/layouts/Default.vue you should have method fetchMenuData which load all categories (all because you have categoriesDynamicPrefetch set to false which is ok). So please check in vuex if you have loaded categories. If yes, then check why it’s not displayed on view. If no, then check if you have categories in Elastic Search