Noble Numbat development images launch with IMDSv2 enabled by default starting from serial 20240218. If your application uses an updated AWS SDK (or uses the CLI directly), then no action should be needed on your end to adopt this when migrating to Noble.
This change was made to increase the security of instance metadata requests. For an in-depth look at the differences between version 1 and 2, see this blog post.
Note that similar changes are planned for <24.04, but those will be made at a later date. Watch this post for more details as those plans solidify.