You can replace the location "settings/store" to your own location like as dokan_get_navigation_url( 'dashboard' );

Redirect seller after registration : Dokan

add_filter('woocommerce_registration_redirect', 'ps_wc_registration_redirect');
function ps_wc_registration_redirect( $redirect_to ) {
    if ( is_user_logged_in() ){
	    $current_user = wp_get_current_user();
		if( $current_user->roles[0] == 'seller' ) {
		    $redirect_to = dokan_get_navigation_url( 'settings/store' );
	 		return $redirect_to;
		}
	}
	return $redirect_to;