BraiinsOS firmware is already tuning on a chip-by-chip basis for maximum efficiency. The software just does it in the background without showing you the exact values or letting you tweak them.
Braiins Pool also gives you a discount on pool fees if you use BraiinsOS firmware.
https://vnish.com/ is opensource firmware with more features/controls/insight into your asics. You can view and tweak the exact voltages applied to each chip and debug issues more easily. However, there is a dev fee collected by acics running vnish firmware.
With great power comes great responsibility. All it takes is one fried hashboard to undo all the gains from an entire week of tweaking settings.
Also look into https://foreman.mn
You can orchestrate and monitor deployments of many different asics remotely using foreman.
The above reply by @nullcount is exactly what I was going to add.
There are also methods to hack the S19 hardware, splitting the hash boards out, so that you can mine on 110V, using a single hashboard; if that's useful. I can't find the link for doing this to save my life. But if you're interested, I can get the link from a friend..