Explore elastic observability

We ELK cluster running on 6.8.9 and planning to upgrade soon to latest stable version.
Does the latest stable version have elastic observability features?

How is it different than ELK stack I have?

ELK stack I have - Elasticsearch, Kibana and Logstash.
I have defined custom input filters for creating index.

Can you share some examples of elastic observability?

The difference in observability features from 6.8 to 8.x is immense!!!