pyinstaller

[snippsat]

Well, how about this - a site which explains about Pyinstaller on linux specifically
https://docs.python.org/3/using/unix.html

No there is no mention of Pyinstaller there at all
That just a normal build and without --enable-shared ,so that would give same problems with using Pyinstaller.

The point is that most build with ./configure --enable-shared.
These two show how to build with --enable-shared .
Python 3 from source, Build and Install Python 3.7 on Ubuntu/Debian

Or can use pyenv as i showed.

PYTHON_CONFIGURE_OPTS="--enable-shared" pyenv install 3.8.3

So a other option as talked about is trying to fix his already build Python version,so it find these shared libraries.
As mention search for solution on his distro.

libpython3.7.so.1.0, libpython3.7mu.so.1.0, libpython3.7m.so, libpython3.7m.so.1.0