[Data/Postgres][HA for followers database or load balancer for followers]

### Required Terms

- [X] I agree to follow this project's [Code of Conduct](https://github.com/heroku/roadmap/blob/main/CODE_OF_CONDUCT.md)
- [X] I have read and accept the [Salesforce Program Agreement](https://www.salesforce.com/company/program-agreement/)

### What service(s) is this request for?

Postgres

### Tell us about what you're trying to solve. What challenges are you facing?

```markdown
Postgres Plans with High Availability have standby only for leader database and the followers don't have any hidden standby. In case of failures followers can take upto 15 minutes to come back online which can be critical for production applications. Having standbys for followers or some kind of load balancing among followers would be helpful in such situations.
https://heroku.support/1168081
https://devcenter.heroku.com/articles/heroku-postgres-ha
```