How to hide the up button for mobile?

Hi there,

do you mean the back to top button ?

https://docs.generatepress.com/article/back-to-top-button/

If so try adding this PHP Snippet:

add_filter( 'option_generate_settings','no_mobile_back_to_top' );
function no_mobile_back_to_top( $options ) {
    if ( wp_is_mobile() ) {
        $options['back_to_top'] = 'disable';
    }
    
    return $options;
}

Yes it works!
Thanks so much for your help, David!
Good luck!

Solved

Glad to hear that !