<div role="tablist" class="tabpanel" id="accordian1"> 


    <h2 aria-selected="false" role="tab" aria-controls="expand_01_open" id="expand_01" class="expand_button">Title 1</h2>
    <div id="expand_01_open" class="expand_content">
	Content 1
    </div>


    <h2 aria-selected="false" role="tab" aria-controls="expand_02_open" id="expand_02" class="expand_button">Title 2</h2>
    <div id="expand_02_open" class="expand_content">
	Content 2
    </div>


</div>
<div class="ct_space"></div>

.expand_button {
    float: left;
    width: 100%;
    padding-top: 25px!important;
    padding-bottom: 35px !important;
    padding-left: 25px;
    color: #015b66!important;
    margin-bottom: 0px !important;
    margin-top: 0px !important;
    text-decoration: none !important;
    border-left: 2px #0e656f solid;
    border-right: 0px silver solid;
    border-bottom: 0px!important;
    border-top: 0px silver solid !important;
    font-size: 17px !important;
    -webkit-transition: all 0.1s ease-in-out;
    -moz-transition: all 0.1s ease-in-out;
    -o-transition: all 0.1s ease-in-out;
    transition: all 0.1s ease-in-out;
    opacity: 1;
    font-weight: 400 !important;
    background: #f5f5f5;
    background-color: #f5f5f5;
    margin-bottom: 6px;
    border-bottom: 2px solid white!important;
	cursor: pointer;
}

.expand_button:hover, .expand_button:focus {
    border-left: 2px #0e656f solid;
    background: #e6e4e4!important;
}

.expand_content {
    float: left;
    width: 100%;
    padding: 20px;
    margin-bottom: 50px;
    border-left: 2px #0e656f solid;
    padding-left: 30px;
    padding-top: 39px;
}

.expand_content_close {
    float: left;
    margin-top: 50px;
    border: 0px;
    color: #015b66;
    width: 100%;
    text-align: center;
    padding: 10px;
    position: relative;
    background: whitesmoke;
    color: #074751!important;
    border: 1px solid #e0e0e0!important;
    border-radius: 4px;
    cursor: pointer;
}

.expand_content_close:hover, .expand_content_close:focus {
    background-color: #f1f1f1;
}

<script src="https://code.jquery.com/jquery-3.7.1.js"></script>

<script>
	jQuery( document ).ready(function( $ ) {

		var hold_accordian_divs = [];
		function start_accordian(){			
				
				// hide all sections
				$(".expand_button").each(function() {
					
					var getaccid = $(this).attr('id');			
					
					// add tab indexs
					$(this).attr("tabindex", "0");		
									
					// add div to array
					hold_accordian_divs[getaccid] = 'closed';
					// hide div
					$('#'+getaccid+'_open').hide(); 	  			
					$('#'+getaccid+'_open').append('<button id="close_'+getaccid+'" data-close="'+getaccid+'" aria-controls="'+getaccid+'_open" type="button" class="expand_content_close">Close panel</button>');
								
				});			
				

				$('.expand_content_close').click(function(event){
					event.preventDefault();
					
					var panel_close = $(this).data('close');
					
					$('#'+panel_close+'_open').slideUp('medium');
					hold_accordian_divs[panel_close] = 'closed';					
					$('#'+panel_close).attr("aria-selected", "false");				
					
					$('#'+panel_close).focus();				
					
				});		
				
				
				$('.expand_button').click(function(event) {					
						event.preventDefault();
					
						var getaccid2 = $(this).attr('id');			
						
						// hide or show div
						if(hold_accordian_divs[getaccid2] == 'closed'){
							$('#'+getaccid2+'_open').slideDown('medium');
							hold_accordian_divs[getaccid2] = 'open';
							$('#'+getaccid2).attr("aria-selected", "true");
						
						} else {
							$('#'+getaccid2+'_open').slideUp('medium');
							hold_accordian_divs[getaccid2] = 'closed';					
							$('#'+getaccid2).attr("aria-selected", "false");	
						}
				});
			
			

				// accesibility - enable clicking for spacebar and enter
				$('.expand_button').keydown(function(ev) {
					if (ev.which == 32 || ev.which == 13 ) {
						$(this).click()
					}			

				});	
				

					// auto open accordian on page load?
				var hash = window.location.hash;			
				var parent_class = $('[name="' + hash.substr(1) + '"]').parent();		
				if ($(parent_class).hasClass( "expand_button" )){			
					var panel_open = $(parent_class).attr('aria-selected');					
					if(panel_open == 'false'){			
						$(parent_class).click();
					}						
				}
				
				

		}; //e start accordian
		start_accordian();
	});
</script>