Hi Hannah,
The SEO Framework will never alter your content or layout, it will only help Search Engines better understand your website through hidden metadata.
So, the outputted breadcrumbs are hidden in a script :). Search Engines like Google can read them.
For instance, if you type in the following in your browser:
view-source:https://www.medpartner.club/archives/462
You can see the following is being output in your header:
<script type="application/ld+json">{"@context":"http:\/\/schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"https:\/\/www.medpartner.club","name":"MedPartner \u7f8e\u7684\u597d\u670b\u53cb \u2013 \u5206\u4eab\u6b63\u78ba\u91ab\u7f8e\u548c\u4fdd\u990a\u77e5\u8b58"}},{"@type":"ListItem","position":2,"item":{"@id":"https:\/\/www.medpartner.club\/archives\/category\/cure","name":"\u6cbb\u7642\u77e5\u8b58"}},{"@type":"ListItem","position":3,"item":{"@id":"https:\/\/www.medpartner.club\/archives\/462","name":"\u590f\u65e5\u9664\u6bdb\u5168\u653b\u7565"}}]}</script>
That is the breadcrumb.
The \u53cb
and other strange characters are in Unicode; which Google and other Search Engines can read as (in this case) Chinese.
If you wish to know what other types of both hidden and visible structured data your website contains (that Google can use), please visit their Testing Tool.
I hope this clears things up! Feel free to ask any more questions :). Have a great day!