Can you guys check if Dictionary or Voice Control (Accessibility in System Preferences) is working for you? I just noticed my installation is missing several assets in /System/Library/AssetsV2, no dictionary is installed except Wikipedia, so functions like Lookup (right click a word and select Lookup) does not work.
I compared the content of this folder to the ones on my MacBook Pro and Mac mini, and the VM is missing a lot of asset files. What is also strange is that any attempt to download or fetch new dictionaries from Apple, or enable Voice Control which requires downloading a file from Apple, times out. This does not happen on my original Macs and it does not seem to be a network issue. I already reinstalled macOS and changed the SMBIOS, currently using MacPro7,1.
EDIT: the problem was that my original installer was created in another Mac by downloading the macOS installer from the App Store. I had to build the installer using gibMacOS which seems to install all required assets. Not sure why this is the case.