Example:

    function refresh(reset_page){
        if(typeof reset_page == 'undefined'){
            reset_page = false;
        }
        datatable.ajax.reload(null, reset_page);
    }

Using destroy()

function refresh(){
        if(datatable != null){
            datatable.destroy();
        }
        
        init_dt();
    }

Reference:

1. https://datatables.net/reference/api/ajax.reload()
2. https://stackoverflow.com/questions/42905454/datatables-ajax-reload-loses-page