I fixed my issue by...
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downloading Python 3 at the official website and installing it via express installation
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C&P the standalone python into the ampps/python folder and overwriting the python version provided by AMPPS
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running
python
-m pip install --upgrade pip in cmd
Now pip and python 3 are installed in their latest version.
It seems that AMPPS doesnt't provide a full-fledged python build. So you need to update python yourself.
Thanks to y'all.