Change Post Tags to

Hi there, can you tell me how I can set that the titles of my posts are used to be in a <h2> Tag on my post-summary site?

https://www.fahrradhaus-jaehn.de/joomla4/blog

Right now - the first item is set in <h1> - the next are set in

<div class="eb-mag-title" itemprop="name headline">
<a></a>
</div>

I want them all in <h2>.

Thanks for your hlep,
kweb