The Nuki Bridge should be able to handle IPv6 networking, at least for the Bridge Web API.
TCP over IPv6
For personal reasons I have an IPv6-only network.
It would then be possible to use the Nuki Bridge in IPv6-only networks without special compatibility configuration.
It would be possible to easily access the Nuki Bridge Web API from the Internet without all of the IPv4 legacy hurdles.
It would require HTTPS support or any other kind of encryption for the Bridge Web API.
Consequences of ignoring this feature
The Nuki company is already competing with itself, see https://nuki.io/de/hilfe/bridge-de/android-bridge-app/android-bridge-app/