Default behaviour of Typo3 is that Typo3-Links are not rendered in a HTML-element. There is a workaround, see here: How to get rendered links of a HTML element in TYPO3 7.6
Unfortunately, in Typo3 9.5.7 this seems not to work. As described above, I replaced html.html by this:
<f:format.htmlentitiesDecode>
<f:format.html parseFuncTSPath="lib.parseFunc">
{data.bodytext}
</f:format.html>
</f:format.htmlentitiesDecode>
I also replaced html.html by this, did't work for me:
<f:format.html>{data.bodytext}</f:format.html>
In the HTML-element I tested these variations of links, but none works:
<a class="download-link" href="t3://file?uid=107" target="_blank">Download (PDF)</a>
<link t3resources/cms/pdf/linux.pdf>Administration von Linux-PCs</link>
<link 27>Linktext</link>