In Xcode 12.3 empty is the list of prior simulator versions. How can I download prior iOS simulators...?

In Xcode 12.3 the list of prior simulator versions is empty, making it impossible to download prior iOS simulator versions.

How can I fix this? Or is it just an endemic bug that Apple allowed to slip into the release of Xcode 12.3?

Both myself and another engineer at my company have experienced the same issue. We are both on Catalina 10.15.7 (19H114).

We both installed Xcode 12.3 when it was in RC, but it's the same exact build as the official release (12C33).