I need to sanitize the output of admin_notices which uses certain things like
Is it good idea to use wp_kses_post function?
Reading docs I am uncertain what HTML tags are allowed https://developer.wordpress.org/reference/functions/wp_kses_post/
To check the list of allowed tags and attributes for wp_kses_post you can use
echo '<pre>';
print_r( wp_kses_allowed_html( 'post' ) );
echo '</pre>';
die();
In your case, where only a and strong allowed, you can use wp_kses function (docs) instead
$allowed_html = [
'a' => [
'id' => true,
'href' => true,
'title' => true,
],
'strong' => [],
];
$clear_post = wp_kses( $post, $allowed_html );