We heard you, you are tired of our giant monorepo, and we support you.
Backend infra summarized all our research and experience with multi-repo practice here : https://29022131.atlassian.net/wiki/spaces/BEI/pages/690029536/Introduction+to+Multi-Repository+Practice+and+old-monorepo-2017+Migration+Guide . Feel free to read it and try it! It's still expanding too, don't hesitate to give your input or argue with anything written there.
As mentioned in the page, actually the first step you have to do is ask backend-infra first. Multi-repo is a dangerous practice if you don't understand some of the fundamentals, and we are willing to help you to do it.
Thanks!
:bow: