PSA: Broken features on macOS Sequoia (15.0 & OCLP 2.0.1) + 2017 15-inch MacBook Pro

I upgraded last night using OCLP 2.0.1. These features are currently broken (at least on my model):

1. iPhone Mirroring - this feature requires the T2 chip so it is not expected to work

2. Widgets from my iPhone are either blank or loading indefinitely

3. Game Centre is stuck loading in the Settings

4. Contacts app - freezes and won't open at all

5. Find My and Apple Maps - open, but freeze (spinning ball) the moment you try to use them

6. The most critical - Messages and FaceTime are not working at all. The Messages windows does open after a while, but it freezes whenever I click on anything.