Similar to your previous post, you could completely rebuild the attributes as you want them:
Or, just to alter one part of the default output, you could try capturing the output and them use Liquid filters on the variable:
{% capture attrbs %}{% component source: "Products", itemId: "{{this.Id}}", type: "item_attributes" %}{% endcapture %}
{{attrbs | remove: "$0.00"}}
The above would remove a zero $ price tag, or other known price… not sure how you’d target an unknown price though. Would have to give that some more thought…