Fluent forms block is the extension of Fluent forms plugin. You can build advanced Contact form by Fluent form block.
MailPoet add-on for Gutenberg Forms. Connect with MailPoet and send leads/subscribers to your MailPoet list with the form submissions.
Akismet add-on for Gutenberg Forms. Connect with Akismet and protect your form submissions against spam via their global database of spam.