Creating a contact form with Laravel frontend

There is a plugin by the creators of ContactForm7, called Flamingo, intended to saving the comments people does in pages, etc. Actually it uses custom post-types to capture the comments people send. To take advantage of it you should store the submissions of your form as comments, if you are hesitant of importing the comments api (via require it), you could use the REST API to make submissions to the WP backend.

https://contactform7.com/save-submitted-messages-with-flamingo/