The district tool should now have an option to specialize commercial zones too. Steam also patches the game automatically so you should definitely have it there. I haven’t heard of anything like that with the latest patch 1.2.0, so you could check if the game has updated succesfully.
Why are there no zone specialization tools beyond the one for Industrial. I tried to create a leisure zone but there’s no option. If this was patched, should Steam be pushing the patch or do I need to do this manually?