Is the Battery Health Management available for older MacBooks too (i.e. Retina Display 2014)?

It is available on my 2016 MacBook Pro. Also, the following doesn't mention any requirement other than having macOS 10.15.5 installed. About battery health management in Mac notebooks - Apple Support

That's not conclusive as there may be a hardware requirement that was omitted from the support article in error.

https://www.macworld.com/article/3538611/macos-catalina-new-battery-health-management-to-extend-macbook-battery-life.html

Battery Health Management is for all users with a 2016 or later MacBook Pro and 2018 or later MacBook Air.

BaronThompson wrote:

Battery Health Management is for all users with a 2016 or later MacBook Pro and 2018 or later MacBook Air.

Good to know. Can you post a link to the source for that information?

Thanks Baron!