I want to display all pagination pages in category pages

Hi there,

this Doc provides the PHP Snippet you require:

https://docs.generatepress.com/article/generate_pagination_mid_size/

To show all links just return a really large number eg. 99 :

add_filter( 'generate_pagination_mid_size','tu_increase_pagination_numbers' );
function tu_increase_pagination_numbers() {
    return 99;
}

Adding PHP: https://docs.generatepress.com/article/adding-php/