tkinter is not provided as it needs end-of-life Tcl/Tk 8.6
The install-scripts folder is:
$HOMEBREW_PREFIX/share/pypy3.12
If you install Python packages via "pypy3.12 setup.py install" or pip_pypy3.12,
any provided scripts will go into the install-scripts folder above. You may want to add
it to your PATH *after* $HOMEBREW_PREFIX/bin so you don't overwrite tools from CPython.
Pip has been installed, so you can use pip_pypy3.12.
It is managed by the formula and should not be modified.