Have you tried running
sudo apt update
sudo apt upgrade
respectively?
That should install available upgrades of all packages currently installed on your system, including Electrum.
I tried this right now. I am still in an older version of Electrum.
sudo apt-get install python3-pyqt5 libsecp256k1-dev python3-cryptography python3-setuptools python3-pip
wget https://download.electrum.org/4.4.6/Electrum-4.4.6.tar.gz
wget https://download.electrum.org/4.4.6/Electrum-4.4.6.tar.gz.asc
gpg --verify Electrum-4.4.6.tar.gz.asc
python3 -m pip install --user Electrum-4.4.6.tar.gz
Even though I tried this before, Now I tried it again and ended up with an error:
error: externally-managed-environment
× This environment is externally managed
╰─> To install Python packages system-wide, try apt install
python3-xyz, where xyz is the package you are trying to
install.
If you wish to install a non-Debian-packaged Python package,
create a virtual environment using python3 -m venv path/to/venv.
Then use path/to/venv/bin/python and path/to/venv/bin/pip. Make
sure you have python3-full installed.
If you wish to install a non-Debian packaged Python application,
it may be easiest to use pipx install xyz, which will manage a
virtual environment for you. Make sure you have pipx installed.
See /usr/share/doc/python3.11/README.venv for more information.
note: If you believe this is a mistake, please contact your Python installation or OS distribution provider. You can override this, at the risk of breaking your Python installation or OS, by passing --break-system-packages.
hint: See PEP 668 for the detailed specification.
-snip-
I can run the .Appimage which I downloaded from Electrum.org, but that does not install Electrum on my system. It just runs the software and does not create a desktop icon in the menu.
Have you tried installing Electrum from Python sources?
Yes, I did I got an error. Check the above, please. I got the same error.
As far as I remember, this is not only on Debian; even on Ubuntu software in 2020, the Electrum version listed there is also outdated.
This is interesting. I don't know how to check if the latest version is available on the Debian server or not. But, thanks for the confirmation. Thanks to vv181 as well. The version I am using is Electrum 4.3.4. If there is no security issue in this version, I am okay with it.