Expected behavior When I do not add the the multiple select dynamically it works

Actual behavior When I use JQUERY to append it it is no longer a combobox with checkboxes it is just a listbox Resources (screenshots, code snippets etc.) This is an example of me appending the multiple select using jquery

                if(st_indication.length){
              st_indication_or_alt += `<div>ST Indication<br><select id="st_indication" class="select" multiple>`
              for(let x = 0; x < st_indication.length; x++){
                st_indication_or_alt += `<option value="${st_indication[x]}">${st_indication[x]}</option>`
              }
              st_indication_or_alt += `</select> </div>`              
            }

$(#${qset_id}).append(${st_indication_or_alt})