PSA: If you want the latest stuff on Fedora Silverblue, rebase to "testing".

rpm-ostee rebase fedora/39/x86_64/testing/silverblue

https://fedoraproject.org/wiki/QA:Updates_Testing#Using_it_with_Fedora_Silverblue_(Kinoite,_Sericea...)

Thanks @6fbf5670 for pointing it out :)