How to create a custom categories page

Here is a sample category.php template. You can place it in the main theme directory.

<?php

/**
 * A Simple Category Template
 */

get_header(); ?>

<section id="primary" class="site-content">
    <div id="content" role="main">

        <?php
        // Check if there are any posts to display
        if (have_posts()) : ?>

            <header class="archive-header">
                <h1 class="archive-title">Category: <?php single_cat_title('', false); ?></h1>


                <?php
                    // Display optional category description
                    if (category_description()) : ?>
                    <div class="archive-meta"><?php echo category_description(); ?></div>
                <?php endif; ?>
            </header>

            <?php

                // The Loop
                while (have_posts()) : the_post(); ?>
                <h2><a href="https://wordpress.stackexchange.com/questions/352377/<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>"><?php the_title(); ?></a></h2>
                <small><?php the_time('F jS, Y') ?> by <?php the_author_posts_link() ?></small>

                <div class="entry">
                    <?php the_content(); ?>

                    <p class="postmetadata"><?php
                                                    comments_popup_link('No comments yet', '1 comment', '% comments', 'comments-link', 'Comments closed');
                                                    ?></p>
                </div>

            <?php endwhile;

            else : ?>
            <p>Sorry, no posts matched your criteria.</p>


        <?php endif; ?>
    </div>
</section>


<?php get_sidebar(); ?>
<?php get_footer(); ?>

Taken from: https://www.wpbeginner.com/wp-themes/how-to-create-category-templates-in-wordpress/