No not that I’m aware of. But I’m also not certain where you’d use it. On Webflow’s hosting, you don’t have the ability to create HTTP POST handlers, and any external POST method recipients you would just target directly from e.g. a form.
We are running into the same problem. We have traffic coming to our current site using the POST method. We are in the process of splitting our site into 2 pieces. We want to redirect the traffic for certain URLs away from the Webflow site back to our other site. This works fine for GET but POST returns a 405 instead of doing the redirect.