Failing to print sorted files

[tester_V]

Greetings!
I'm trying to sort files in a directory by the timestamp.
I got this snipped from the internet and if I specify the directory the snipped works but if I supply the directory by "iterdir()" it fails to print sorted files.

dir_name = 'c:/01/'
list_of_files = filter( os.path.isfile,
                        glob.glob(dir_name + '*') )
list_of_files = sorted( list_of_files,
                        key = os.path.getmtime)
for file_path in list_of_files:
    timestamp_str = time.strftime(  '%m/%d/%Y :: %H:%M:%S',
                                time.gmtime(os.path.getmtime(file_path))) 
    print(timestamp_str, ' -->', file_path) 

This one fails

import os
import glob
from pathlib import Path

dr = "C:/01"
for esbd in Path(dr).iterdir() :
    if esbd.is_dir() :

        dir_name = str(esbd)
        print(f"-- {dir_name}")
        list_of_files = filter( os.path.isfile,
                                glob.glob(dir_name + '*') )
        list_of_files = sorted( list_of_files,
                                key = os.path.getmtime)
        for file_path in list_of_files:
            timestamp_str = time.strftime(  '%m/%d/%Y :: %H:%M:%S',
                                        time.gmtime(os.path.getmtime(file_path))) 
            print(timestamp_str, ' -->', file_path) 

Thank you in advance!