I don’t want to use Anaconda or Miniconda as they install their own version of Python. I need just the conda package manager which I can use with my existing version of Python in existing virtual env. Is there any way to install conda package manager which can work with existing Python installation?
No, this is not possible:
Currently supported install methods include the Anaconda installer and the miniconda installer.
From here
You will either need to install miniconda/anaconda, or use another package manager.
Alternatively, you can use miniforge and its variants, but they still all come "with their own version of python". I don't know of a way to use conda with an existing installation of python