WP Rest endpoint with custom post type and ACF Fields

Advanced custom fields uses get_field() function to retrieve the fields. So, all you have to do is to retrieve them by using:

$field = get_field('field_name', $post->ID, 'format_value');

for each of your fields in the loop. You can read this page for more information.

Questions about plugins are off-topic here, That’s why your question haven’t receive much attention in 4 days. But since it was a simple problem i posted the answer.