Yeah this is weird - it looks like you're running debian bookworm, and it's definitely available:
You could probably workaround it by installing manually from the packages for your architecture linked at the bottom of the page
You have given me a good reminder to give my installer some love though, I haven't got a vagrant test setup for bookworm or a few other newer distros (and there's some legacy ansible includes that need to be fixed too). I'll spend some time on it in the next few days