Having issue on Loading Meta Data From CSV to CPT

Your metas need to be passed to wp_insert_post() as an array like so:

// Insert the post into the database
$post["id"] = wp_insert_post( array(
    "post_title" => $post["title"],
    "post_type" => $cpt["custom-post-type"],
    "meta_input" => array(
        "custom-field-1" =>$cpt["custom-field-1"],
        "custom-field-2" =>$cpt["custom-field-2"],
    )
    "post_status" => "publish"
));

https://developer.wordpress.org/reference/functions/wp_insert_post/#parameters

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