It looks like the V3 admin template does not support the h tags for badges.
The previous version does as well as BS 5
Is this an oversight or will Keen Admin V3 not support them?
From BS 5.2 Badge page.
<h1>Example heading <span class="badge bg-secondary">New</span></h1>
<h2>Example heading <span class="badge bg-secondary">New</span></h2>
Hi,
Thank you for your feedback on this. Good point. We will fix it in the next update of Keen as soon as possible.
Regards.