Corvid equivalent of Form Submit -> Post + Redirect?

Hello -
I am trying to build a form on a site that, upon submit, redirects to a link and posts the form data to that link

Via HTML this can be achieved with the code below.

<form action="{url}" method="post" target="_blank">
 <input> ...
</form>

However, the Wix Form element doesn’t support a redirect that also posts. I could just do the form as a Custom HTML element, but I don’t want to since it is harder to style and maintain. So I am looking for a CORVID solution.

This post details some ways, but none of them work here because it is impossible to use JQuery or access document