We are using SonarQube 9.9.2 Developer Edition, running on PostgreSQL 11, which is already out of support.
We are planning to update SQ to version 10.5.x in a couple of months, and are aiming PostgreSQL 16 as it is our new enterprise standard for databases.
I confirm that even the LTA 9.9 works well with Postgres 16.3.
We upgraded 6 month ago from Postgres 11 to 16 on our SonarQube LTA 9.9 Enterprise and we didnāt find any issue. Due to yearly releases of Postgres and time taken to dump/restore data we prefered to go directly to 16 instead of 15
Just follow the upgrade guide and donāt forget the Upgrade guide Without those step unusable