Use the following codes in the page.php file or in the home page template if you have created any. Use Child theme to edit your theme files
if( is_home() || is_front_page() ) {
$args = array(
'posts_per_page' => -1, // To show all the posts
'cat' => cat_id // Replace cat_id with the actual category id
);
// The Query
$the_query = new WP_Query( $args );
// The Loop
if ( $the_query->have_posts() ) {
while ( $the_query->have_posts() ) {
$the_query->the_post();
echo '<li>' . get_the_title() . '</li>';
}
} else {
// no posts found
}
/* Restore original Post Data */
wp_reset_postdata();
}
For more detail, see the function Reference