Product display limited to 9 by category in custom archives-shop

Hi all!

I display all my products on one page but I only realized recently that the display is limited to 9 items per category; if I go to the category’s page though, it displays everything, example with the spices and herbs category:
https://www.lockoloop.nl/#cat-29
https://www.lockoloop.nl/product-category/spices-herbs/ (shows all 10)
Same happens with any category that has more than 9 items.

I’m guessing something in my code (I didn’t write it) is responsible for this because I tried with another theme and the same happens (I removed what’s not part of the loop).
The only lead I have is that the Products by category widget also displays 9 products by default (3×3), maybe this code is missing some kind of settings?

<?php
// If this file is called directly, abort.
if ( ! defined( 'WPINC' ) ) {
	die;
}
if ( is_admin() ) return false;

// Gets products per category
// first we need to get the product categories ....

$categories_args = array(
	'taxonomy' => 'product_cat' // the taxonomy we want to get terms of
);

$product_categories = get_terms( $categories_args ); // get all terms of the product category taxonomy

if ( is_admin() ) return false;

	echo '<ul class="woocommerce">';

	// now we are looping over each term
	foreach ($product_categories as $product_category) {

		$term_id 	= $product_category->term_id; // Term ID
	    $term_name 	= $product_category->name; // Term name
	    $term_desc 	= $product_category->description; // Term description
	    $term_link 	= get_term_link($product_category->slug, $product_category->taxonomy); // Term link

	    echo '<li class="cat-title" id="cat-'.$term_id.'">'; // for each term we will create one list element
	    echo '<h3>'.$term_name.'</h3>'; // display term name

	    // ... now we will get the products which have that term assigned...

	    $products_args = array(
			'post_type' 	=> 'product', // we want to get products
			'posts_per_page' => -1,
			'tax_query' 	=> array( 
				array(
					'taxonomy' => 'product_cat',
					'field'    => 'term_id',
					'terms'    => $term_id, // here we enter the ID of the current term *this is where the magic happens*
				),
			),
		);

		$products = new WP_Query( $products_args );

		if ( $products->have_posts() ) { // only start if we hace some products

			// START some normal woocommerce loop, as you already posted in your question

			woocommerce_product_loop_start();

			while ( $products->have_posts() ) : $products->the_post();

				wc_get_template_part( 'content', 'product' );

			endwhile; // end of the loop.

			woocommerce_product_loop_end();

			// END the normal woocommerce loop

			// Restore original post data, maybe not needed here (in a plugin it might be necessary)
			wp_reset_postdata();

		} else { // if we have no products, show the default woocommerce no-product loop

			// no posts found
			do_action('woocommerce_no_products_found');

		}//END if $products

		echo '</li>';//END here is the end of our product-cat-term_id list item

	}//END foreach $product_categories

	echo '</ul>';//END of catalog list

Any idea?
Thank you.

As a side note, this code also prevents the search function to work normally since it returns either none or all products.