We’ll use same code as shown in this post to find all posts with a specific custom field value.
That is same as getting ACF values from custom post type.
This following example has complete code with WP_Query too.
-1, 'post_type' => 'guest_posts', 'meta_key' => 'blog', 'meta_value' => 'yogeshchauhan' ); // query $the_query = new WP_Query( $args ); ?> have_posts() ): ?>
Credit: ACF Docs
ACF custom examples get_posts post type WP_Query