to get a list of pip packages that were installed

[snippsat]

now, i am curious how those other 93 package got installed, some of them i have no idea what they do.

As mention so can one pip install have many sub dependencies that get installed.
93 is not a lot at all,i did help someone with install of a machine learning project this one project did install 100 package's.
pip list gives packages without version as freeze do.
Not recommend to move over all for OS install,a least pip list will install new packages and not many old as freeze(make more sense if done in virtual environment)

pip list > requirements.txt
# New OS or virtual enviroment
pip install -r requirements.txt

If want have full control over dependencies look a Poetry
It's a great tool for Python packaging and dependency management.
Will give tree of what eg Request has as sub dependencies.
Quick demo.

G:\div_code
λ poetry --version
Poetry version 1.1.13

G:\div_code
λ poetry new request_test
Created package request_test in request_test

G:\div_code
λ cd request_test\

# Install Requests
G:\div_code\request_test
λ poetry add requests
Using version ^2.27.1 for requests
.....

# Show dependencies that installed and needed bye Requests 
G:\div_code\request_test
λ poetry show requests
name         : requests
version      : 2.27.1
description  : Python HTTP for Humans.

dependencies
 - certifi >=2017.4.17
 - charset-normalizer >=2.0.0,<2.1.0
 - idna >=2.5,<4
 - urllib3 >=1.21.1,<1.27

# Show in tree view,pytest is a default install
G:\div_code\request_test
λ poetry show --tree
pytest 5.4.3 pytest: simple powerful testing with Python
├── atomicwrites >=1.0
├── attrs >=17.4.0
├── colorama *
├── more-itertools >=4.0.0
├── packaging *
│   └── pyparsing >=2.0.2,<3.0.5 || >3.0.5
├── pluggy >=0.12,<1.0
├── py >=1.5.0
└── wcwidth *
requests 2.27.1 Python HTTP for Humans.
├── certifi >=2017.4.17
├── charset-normalizer >=2.0.0,<2.1.0
├── idna >=2.5,<4
└── urllib3 >=1.21.1,<1.27