Pagination not working on homepage, On other pages it is working

Add paged as an argument of the query.

if (get_query_var('paged')) {
    $paged = get_query_var('paged');
} elseif (get_query_var('page')) {
    $paged = get_query_var('page');
} else {
    $paged = 1;
}

In your query arguments:

'paged' => $paged