The way i convert python 2.7 to 3 for maya 2022 (DO IT AT YOUR OWN RISK!)
pip install 2to3
cd C:\Users\rodri\OneDrive\Documents\convert
python -m pip install --upgrade pip
2to3 . -w
pip install 2to3
cd C:\Users\rodri\OneDrive\Documents\convert
python -m pip install --upgrade pip
2to3 . -w