Pacote Postgresql não disponível? [duplicado]

Estou tentando instalar o postgresql em uma nova máquina Ubuntu 24.04. Estou surpreso que depois

$ sudo apt update
Hit:1 https://dl.google.com/linux/chrome/deb stable InRelease
Hit:2 http://security.ubuntu.com/ubuntu noble-security InRelease                                          
Hit:3 http://us.archive.ubuntu.com/ubuntu noble InRelease                                                 
Get:4 http://us.archive.ubuntu.com/ubuntu noble-updates InRelease [126 kB] 
Get:5 https://esm.ubuntu.com/apps/ubuntu noble-apps-security InRelease [7,532 B]
Hit:6 http://us.archive.ubuntu.com/ubuntu noble-backports InRelease   
Get:7 https://esm.ubuntu.com/apps/ubuntu noble-apps-updates InRelease [7,468 B]
Get:8 http://us.archive.ubuntu.com/ubuntu noble-updates/universe i386 Packages [167 kB]
Get:9 http://us.archive.ubuntu.com/ubuntu noble-updates/universe amd64 Packages [384 kB]
Get:10 https://esm.ubuntu.com/infra/ubuntu noble-infra-security InRelease [7,462 B]
Get:11 http://us.archive.ubuntu.com/ubuntu noble-updates/universe amd64 c-n-f Metadata [14.9 kB]
Get:12 https://esm.ubuntu.com/infra/ubuntu noble-infra-updates InRelease [7,461 B]
Fetched 721 kB in 1s (497 kB/s)       
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
All packages are up to date.

isso falha:

$ sudo apt install postgresql
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Package postgresql is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'postgresql' has no installation candidate

Até onde eu sei, esse pacote deve estar disponível e o acima é inesperado. Devo ter feito algo para bagunçar minha máquina, mas não tenho certeza do que. Qualquer ajuda é bem-vinda.