Python-urllib3 ipk for GL-MT300N

hi do you know where I can find the ipk package file of python-urllibs for GL-MT300N?
Thank you.

If you mean https://docs.python.org/3/library/urllib.html then it is part of Python itself. python3-urllib should be the package.

Switching to Python 3, if you have not already done so is strongly suggested. Python 2 is EOL as a language in 2020. Most major ditstros, including OpenWrt have already or will be soon dropping support for Python 2.