Hey everyone,
Apologies for the confusion. In our effort to streamline the update process and provide a more robust user experience, umbrelOS 1.0 has transitioned to using Debian instead of Rasbian for both Raspberry Pi 4 and Pi 5. This change means that traditional methods for configuring Wi-Fi, such as raspi-config, are no longer applicable.
We are actively working to integrate WiFi functionality directly into the umbrelOS user interface. However, this feature is slated for release with umbrelOS 1.1, which is at least a month away.
For the time being, using nmcli is your best bet for configuring Wi-Fi. However, note that any changes made through SSH, including those made with nmcli, will be reset by the next OS update.