Easy Slider next image when click

the crux is – if you have links on your images – they will interfere with prev – next navigation.
If no links are assigned to the images, then it is possible to have left side prev – right side next.

if you got no additional links on the images but buttons inside the slide we can have next slide for image click.

if you only have a slideshow – without buttons and without links on the slides – you can have left side image: prev – and right side image : next
only by css:
(the navigation arrows must be selected as navigation controls – but we do not show them)

.avia-slideshow-arrows.avia-slideshow-controls {
  height: 100% !important;
  width: 100% !important;
  display: block;
  position: absolute;
  top: 0;
  left: 0;
}

#top .avia-slideshow-arrows a {
  width: 50% !important;
  height: 100%;
  top: 0;
  margin:0 !important;
  padding: 0 !important;
  opacity: 0 !important;
}

#top .avia-slideshow-arrows a.prev-slide {
  left: 0;
}

#top .avia-slideshow-arrows a.next-slide {
  right: 0;
}

if you like to have that arrows – we must have that css in addition:
(and remove the opacity : 0 above)

#top .avia-slideshow-arrows a.prev-slide:before {
  text-align: left;
}

#top .avia-slideshow-arrows a.next-slide:before {
  text-align:right;
}

#top .avia-slideshow-arrows a:before  {
  top: 50%;
  width: 30px;
  height: 60px;
}

#top .avia-slideshow-arrows a.prev-slide:before  {
  left: 20px;
  padding-left: 20px
}

#top .avia-slideshow-arrows a.next-slide:before  {
  right: 20px;
  left: auto;
  padding-right: 20px
}

see css solution in action : https://webers-testseite.de/easy-slider-navigation/

but if you have buttons inside those slides we have to do it via child-theme functions.php:
( without the css above – but without prev next option – but you can use buttons on sliders )

function next_slide_on_image_click() { 
?>
<script type="text/javascript">
window.addEventListener("DOMContentLoaded", function () { 
	(function($){
		$('.avia-slide-wrap img').click(function() {
			$(this).closest('.avia-slideshow').find('.avia-slideshow-arrows a.next-slide').trigger('click');
		});
	})(jQuery);
});
</script>
<?php 
}
add_action('wp_footer', 'next_slide_on_image_click');