Kind of, but it has better observability, more reliable networking, and supports the specific subset of features needed from that platform, and better flexibility in terms of what you actually need, while not locking us to a specific way to write applications (like google app engine).

Heroku's simplicity for deploying is honestly a thing to aim for, but using Heroku at scale while keeping things consistent and secure is extremely difficult. It's not built for large, complex infrastructures. It's built for small shops and ad-hoc deployments, and it's dope for that.