WaveLink 3 requires Python 3.10+. You can download the latest version of Python here.
Windows:
py -3.10 -m pip install -U wavelink
Linux:
python3.10 -m pip install -U wavelink
Make sure you have the latest version of Python installed, or if you prefer, a Python version of 3.10 or greater.
If you have any other issues feel free to search for duplicates and then create a new issue on GitHub with as much detail as possible. Including providing the output of pip, your OS details and Python version.