Hi,
I am sorry for the delayed reply.

The widget is not supposed to show load more button. if it is doing that, most probably some theme/css issue.

The widget is for listing activity with paginations.

The problem with load more is it works on the basis of filters/scopes and BuddyPress uses cookies to setup this scope/filter.

If you use load more button, It will give incorrect activities for listing since the activity widget filters and your activity directory filters can be different.

Hope that clarifies.

Hi,
Thank you for the clarification. The code for loading newest activity is part of bussypress.js(that comes with your theme or loaded via the theme compatibility).

Here is the code section in that js file that does it.

	/** Activity HeartBeat ************************************************/

	// Set the interval and the namespace event
	if ( typeof wp !== 'undefined' && typeof wp.heartbeat !== 'undefined' && typeof BP_DTheme.pulse !== 'undefined' ) {

		wp.heartbeat.interval( Number( BP_DTheme.pulse ) );

		jq.fn.extend({
			'heartbeat-send': function() {
				return this.bind( 'heartbeat-send.buddypress' );
			}
		});
	}

	// Set the last id to request after
	var first_item_recorded = 0;
	jq( document ).on( 'heartbeat-send.buddypress', function( e, data ) {

		first_item_recorded = 0;

		// First row is default latest activity id
		if ( jq( '#buddypress ul.activity-list li' ).first().prop( 'id' ) ) {
			// getting the timestamp
			timestamp = jq( '#buddypress ul.activity-list li' ).first().prop( 'class' ).match( /date-recorded-([0-9]+)/ );

			if ( timestamp ) {
				first_item_recorded = timestamp[1];
			}
		}

		if ( 0 === activity_last_recorded || Number( first_item_recorded ) > activity_last_recorded ) {
			activity_last_recorded = Number( first_item_recorded );
		}

		data.bp_activity_last_recorded = activity_last_recorded;

		last_recorded_search = bp_get_querystring('s');

		if ( last_recorded_search ) {
			data.bp_activity_last_recorded_search_terms = last_recorded_search;
		}
	});

	// Increment newest_activities and activity_last_recorded if data has been returned
	jq( document ).on( 'heartbeat-tick', function( e, data ) {

		// Only proceed if we have newest activities
		if ( ! data.bp_activity_newest_activities ) {
			return;
		}

		newest_activities = data.bp_activity_newest_activities.activities + newest_activities;
		activity_last_recorded  = Number( data.bp_activity_newest_activities.last_recorded );

		if ( jq( '#buddypress ul.activity-list li' ).first().hasClass( 'load-newest' ) ) {
			return;
		}

		jq( '#buddypress ul.activity-list' ).prepend( '<li class="load-newest"><a href="#newest">' + BP_DTheme.newest + '</a></li>' );
	});
});

Most probably the buddypress.js file is not getting loaded on your page where you have used the shortcode. Please check for that.