The short answer is no. Here's a few more details. Before I tried it myself, I googled and ended up on a conversation on the FlutterFlow forums, but it doesn't really give any real information. So I won't link to it. The only relevant piece of info is an Admin

On Oct 30, 2022, publishing to a custom domain on FlutterFlow was announced via a newsletter: To start you can publish one custom domain per Pro or Teams account, additional options coming soon! Looking at the Pricing, they encourage you to pay annually (25% discount). Also, the Pro and Teams

FlutterFlow provides two built-in components to display HTML, but they can't display local HTML with Javascript: * HtmlView only supports HTML and CSS parsing. It does not run Javascript. * WebView only supports remote URLs. In order to display HTML with Javascript support, one has to use a custom Widget. I asked