In February 2023 we published our latest Netplan release v0.106, which contained an interesting new feature, called netplan status. This new sub-command queries your system for IP addresses, routes, DNS information, etc… in addition to the Netplan backend renderer (NetworkManager/networkd) in use and the relevant Netplan YAML configuration ID. It displays all this in a nicely formatted way (or alternatively in machine-readable YAML/JSON format).
This new feature was presented in more detail at the Ubuntu engineering sprint in Prague (May 2023). Please find the video below to watch this lightning talk: