Problem with dynamic libraries in an executable packaged with PyInstaller (--onedir) and Electron Builder on Linux

Question

I have a small project that uses python3 for the backend and for the front electron.

And in development mode, the electron with the python backend works fine.

But when I make a binary of the backend (with pyinstaller, the onedir option and in GNU/Linux) it works fine when executed directly and through a debian docker container (clean).

But when executed inside a packaged electron (I have tried with zip, AppImage) it doesn't work, I have seen that there is the binary generated by pyinstaller and everything needed in the app.asar file.

This is my test package.json:

{
  "name": "electron_version",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "build": {
    "appId": "com.electron.python",
    "files": [
      "backend/dist/**" ,
      "index.js" , "preload.js" , "index.html"],
    "win": {
      "target": "nsis"
    },
    "nsis": {
      "oneClick": false,
      "perMachine": true,
      "allowToChangeInstallationDirectory": true,
      "createDesktopShortcut": true,
      "createStartMenuShortcut": true
    }
  },
  "scripts": {
    "start": "electron .",
    "build": "electron-builder "
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "electron": "^33.2.1",
    "electron-builder": "^25.1.8"
  },
  "dependencies": {
    "kill-sync": "^1.0.3"
  }
}

And this is the bug that comes up when running the appImage generated by electron-builder:

$ ./electron_version-1.0.0.AppImage 
[LOG] Resources dir app: /tmp/.mount_electrkTgpul/resources/app
[LOG] Binary to execute: /tmp/.mount_electrkTgpul/resources/app.asar/backend/dist/main/main
[PYI-1293917:ERROR] Failed to load Python shared library '/tmp/_internal/libpython3.10.so.1.0': dlopen: /tmp/_internal/libpython3.10.so.1.0: cannot open shared object file: No such file or directory
Error: Command failed: /tmp/.org.chromium.Chromium.gl3Y2C
[PYI-1293917:ERROR] Failed to load Python shared library '/tmp/_internal/libpython3.10.so.1.0': dlopen: /tmp/_internal/libpython3.10.so.1.0: cannot open shared object file: No such file or directory

    at genericNodeError (node:internal/errors:984:15)
    at wrappedFn (node:internal/errors:538:14)
    at ChildProcess.exithandler (node:child_process:422:12)
    at ChildProcess.emit (node:events:518:28)
    at maybeClose (node:internal/child_process:1104:16)
    at Socket.<anonymous> (node:internal/child_process:456:11)
    at Socket.emit (node:events:518:28)
    at Pipe.<anonymous> (node:net:343:12) {
  code: 255,
  killed: false,
  signal: null,
  cmd: '/tmp/.org.chromium.Chromium.gl3Y2C'
}

The error says that it does not find the dynamic library libpython3.10.so.1.0 but it is inside the _internal directory in the app.asar file.