As mentioned in the article, this operator uses CNPG and adds easy plugin management (Nice!) and Stacks (prebuilt optimized deployments, although I’m unsure what this does exactly. It just sounds like containers with optimized settings)
For examples, you can look at https://github.com/tembo-io/tembo/tree/main/tembo-operator/s...
[1] Blog about Stacks: https://tembo.io/blog/tembo-stacks-intro/
For example re: extensions, you can add postgres extensions to your spec and the operator will handle getting the extensions installing extensions from pgt.dev into your Postgres instance.