Huawei has started distributing firmware version 11.0.8.26 to the Watch GT 2 Pro in Europe. Firmware version 11.0.8.26 has a long changelog and is nearly a 100 MB download. Accordingly, Huawei has included numerous changes and optimisations, such as adding Petal Maps as a pre-installed Maps app.
https://www.notebookcheck.net/Huawei-Watch-GT-2-Pro-receives-long-awaited-software-update-with-various-changes-and-optimisations.619019.0.html