Comment by NotPractical

From the article:

> While sadly, it doesn’t look like there will be any ADB command you can send to your phone to make it immediately jump to the end of that 24-hour delay

There's also no evidence that adb-sideloaded app stores will be able to skip PackageInstaller's developer verification enforcement, so no, you will have to wait 24 hours to install F-Droid and actually use it.