Great question!
We have a dedicated group in TestFlight for these builds, but unfortunately Apple doesn’t expose the build groups in TF for external testers. As such, having automatic updates turned off is needed to test this build over time and yes, keeping an eye out for updates. This should happen automatically when you “get off track” and install a specific TF build.
Besides communicating here, we’ll also ensure we include something in the build release notes.
Once we’re ready to release and include the changes in the main beta track, we’ll also announce it here so folks can re-enable automatic updates in TF.