The real answee is CI/CD DevOps pipelines.
What this means is that, when I as a developer push changes to my dev branch in my code repository, a bunch of scripts and stuff automatically test my code for a bunch of things, and if all of those tests pass, another script is run that pushes the code to my main branch and then compiles my app from the main code, and finally the last script pushes the compiled "artefact" out to the public (.exe's out on a webpage to download, a linux package gets pushed out to repos and to Flathub, Android apps get pushed to the Play and/or F-Droid stores, Apple stuff gets sent to an Apple computer and compiled and uploaded to the App store, etc.)
It streamlines the development process and makes life on the developer so, so much easier while making sure bugs also get fixed for users much quicker and the app stays more stable.