This trigger copies all the triggers attached to one table to another. If you use the tables name in the trigger, that'll get replaced as well.

copy-triggers.sql

CREATE OR REPLACE FUNCTION copy_table_triggers(p_source_tablename text, p_dest_tablename text) RETURNS boolean
    LANGUAGE plpgsql
AS
$$
DECLARE
v_sql                   text;
v_trigger_list          record;

BEGIN
-- Triggers
FOR v_trigger_list IN
    SELECT tgrelid::regclass AS parent_table,
           tgname AS trigger_name,
           pg_get_triggerdef(oid) as trigger_def,
           pg_get_functiondef(tgfoid) as trigger_function_def
      FROM pg_trigger
     WHERE tgrelid = p_source_tablename::regclass
    LOOP

    v_sql := replace((v_trigger_list.trigger_function_def || ';' || v_trigger_list.trigger_def), p_source_tablename::regclass::TEXT, p_dest_tablename::regclass::TEXT);
    RAISE DEBUG 'Create Trigger: %', v_sql;
    EXECUTE v_sql;
END LOOP;

RETURN true;

END
$$;

SELECT copy_table_triggers('public.backend_logs2', 'public.backend_logs3');