WooCommerce Template overriding not working with woocommerce.php

It’s a custom theme, so first of all you should check if WooCommerce support is declared in the functions.php.

WooCommerce can be integrated with the theme by using woocommerce_content() (woocommerce.php file) or by template overrides, but in both cases the declaration of support in the theme is required.

function wpse319485_add_woocommerce_support() {
    add_theme_support( 'woocommerce' );
}
add_action( 'after_setup_theme', 'wpse319485_add_woocommerce_support' );