IINM the problem is that the configuration you made when installing was saved to your RAM disk (the one that was loaded from the USB/CD). However, when you boot after installation you are reading it from the installed system (the one you mount at /mnt as per the installation instructions).
So, that's why it is unconfigured: the network settings are not propagated from one system to another.
In fact, you could decide using different tools to configure the network when installing and then when running the installed system. It's two different systems of their own.
> how do i make sure that networking works after an installation?One way is to configure again after first reboot. Another way could be configuring the network again while in the installation chroot (for example, if you run iwctl in the chroot, it will save the correct WiFi password to the chroot's /var/lib/..... path). I have not tested the second method, though. Don't know if it could lead to any issue.
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