Ubuntu 23.04 Daily Builds Now Include the New Installer By Default
At the end of the installation process, a new end screen is shown with options to either restart Ubuntu or shut down.
The overall install experience has been upgraded to current standards, which makes it more appealing, providing a modern user experience.
Unfortunately, you will have to wait a bit more for Ubuntu 23.04's release or at least its beta release to get your hands on to properly test it out without risking encountering bugs.