The Ubports team just updated Focal and released first Noble UT 
New OTA Blog OTA-10 Focal is now rolling out full details in the blog.
[…] The most important change in this release is the inclusion of the new Ubuntu Touch upgrader, which allow users to upgrade to Ubuntu Touch 24.04-1.0 once it’s released.
We are very pleased to announce the release of Ubuntu Touch 24.04-1.0.
This is the first Stable release of Ubuntu Touch based on 24.04 Noble Numbat.
Full details can be found in the following blog:
If you upgrade, be aware that first boot can take time 
If you have a large number of applications installed (say, more than 30 apps), the first boot after the upgrade can take longer than usual before the Ubuntu Touch logo appears. This is due to a configuration regeneration that happens at early boot. Subsequent boots will take a shorter time.