The missing is_posts_page() function of WordPress

README.md

is_posts_page()

Returns boolean whether the current page is the posts page as set from the dashboard.

functions.php

<?php
if( !function_exists('is_posts_page') ){
	function is_posts_page(){
		$page_for_posts = intval( get_option( 'page_for_posts' ) );
		$current_page = get_queried_object_id();
		if( $page_for_posts === $current_page ){
			return true;
		}
		return false;
	}
}
?>

home.php

<?php
if( is_front_page() ){
	// codes for rendering the home page
	// see https://developer.wordpress.org/themes/basics/template-files/
} elseif ( is_posts_page() ) {
	// codes for rendering the loop
	// see https://developer.wordpress.org/themes/basics/the-loop/
}

// see https://wphierarchy.com/
?>