Add this code in WPLMS child theme - functions.php or WPLMS customizer - wplms_customizer.php
STEP 1 : Add a Multi - information field in Course settings metabox
Add thes lines in _construct().
add_filter('wplms_course_metabox',array($this,'wplms_custom_course_details_repeatable'),10,6);
add_filter('wplms_course_details_widget',array($this,'wplms_custom_course_details_information'),10,7);

STEP 2 : Display this information in Course details.
add these function after _construct
unction wplms_custom_course_details_repeatable($metabox){
$metabox['vibe_course_details'] = array(
'label' => __('Custom Course details','vibe-customtypes'), // <label>
'desc' => __('custom course details.','vibe-customtypes'), // description
'id' => 'vibe_course_details', // field id and name
'type' => 'repeatable', // type of field
'std' => ''
);
return $metabox;
}
function wplms_custom_course_details_information($details){
$custom_info = vibe_sanitize(get_post_meta(get_the_ID(),'vibe_course_details',false));
$icon=array("icon-plus-1","icon-clock");
$rgLinks = array_combine($custom_info, $icon);
if(isset($custom_info) && is_array($custom_info)){
foreach($rgLinks as $k=>$val) {
$details[]='<li><i class='.$val.'></i> '.$k.'</li>';
}
}
return $details;
}