Hello, according to the documentation, Postgres 12 should have multi range functions. However, in my installation of Postgres 12.12, I don't have any multi range function. When I ran them Postgres said they didn't exist and I can't see them when querying through pg_proc.
What documentation says they should be in version 12? The page you commented on is about PostgreSQL 15, and multiranges were not present in version 12...