I first must install and after that update.
Sure. This update in
updates-testing repo which supposed to go after QA to
updates repo. And if you already installed this package you will receive update automatically. But if you want to test this package you need to install it first and then update via this command in Bodhi. Or you can install it via
bodhi CLI tool, or manually from Koji.
Being a Gnome thing it could be necessary to use tweaks or whatever.
gnome-tweaks to enable it or even better you need new
gnome-extensions-app. You can also enable it in CLI via