Hi @joshualeong
You don’t need to use the wp_insert_post() function anymore with acf_form(). You can set the post type and status by passing the new_post arguments. This page should give you more idea about it: https://www.advancedcustomfields.com/resources/using-acf_form-to-create-a-new-post/. If you want to change the title, I suggest you use the acf/save_post and wp_update_post() instead.
I hope this helps.
