Electro v2 - Change wishlist and compare icon

functions.php

add_filter( 'electro_compare_icon', 'ec_child_change_compare_icon', 20 );

function ec_child_change_compare_icon( $compare_icon ) {
    $compare_icon = 'fas fa-columns';
    return $compare_icon;
}

add_filter( 'electro_wishlist_icon', 'ec_child_change_wishlist_icon', 20 );

function ec_child_change_wishlist_icon( $wishlist_icon ) {
    $wishlist_icon = 'fas fa-heart';
    return $wishlist_icon;
}

style.css

.header-icon[data-title=Compare] i,
.header-icon[data-title=Wishlist] i {
    color: #000;
}