Insert metadata programmatically

Hello, I am programming a function that extracts meta description and meta keywords from a specific page, I am trying to insert them into the corresponding post:

update_post_meta($post_id, '_aioseop_description', $meta_description);
update_post_meta($post_id, '_aioseop_keywords', $meta_keywords);

I don’t know if I’m using the correct constants (_aioseop_description and _aioseop_keywords) or not, but I can’t insert what I need into AIOSEO, nor do I have any kind of error.
I would appreciate any help on this, and I’m attaching my full code, just in case.

// Extract the title

if (preg_match('/<title>(.*?)<\/title>/i', $page_content, $matches)) {

$page_title = $matches[1];

error_log('Page title found: ' . $page_title);

} else {

error_log('Page title not found.');

}

// Extract meta description

if (preg_match('/<meta name="description" content="([^"]*)"/i', $page_content, $matches)) {

$meta_description = $matches[1];

update_post_meta($post_id, '_aioseop_description', $meta_description);

error_log('Meta description updated: ' . $meta_description);

} else {

error_log('Meta description not found.');

}

// Extract meta keywords (if available)

if (preg_match('/<meta name="keywords" content="([^"]*)"/i', $page_content, $matches)) {

$meta_keywords = $matches[1];

update_post_meta($post_id, '_aioseop_keywords', $meta_keywords);

error_log('Meta keywords updated: ' . $meta_keywords);

} else {

error_log('Meta keywords not found.');

}

$post = array(

'ID' => $post_id,

'post_title' => $page_title,

);

wp_update_post($post);

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