Yes, it is possible to create a new category for posts using an Advanced Custom Fields (ACF) form.
You will need to use the wp_insert_category function to insert the new category into the database.
You can also use the wp_set_object_terms function to assign the new category to the post when the post is created or updated.
It’s also possible to use a plugin such as Gravity Forms or Contact Form 7 that allow you to create forms and use the acf hooks to handle the form submission.
