Your current HTML for selecting a Knot is not accessible:
<div class="flex items-center">
<input type="radio" name="domain" value="knot1.tangled.sh" class="mr-2" id="domain-knot1.tangled.sh">
<span class="dark:text-white">knot1.tangled.sh</span>
</div>
This should use a label element, rather than a span.
https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements/label
I don't know how to link pulls to issues. So here's a manual link. https://tangled.sh/@tangled.sh/core/pulls/479