I reinstalled the app just now to re-check.
Click the green 'Add chat' icon.
It prompts: "To help you connect with friends and family, allow WhatsApp access to your contacts" with options for Not now, and Continue.
Not Now closes the dialogue, and returns you to the main chat list.
Continue launches the Android prompt for "Allow WhatsApp to your contacts", clicking Don't Allow returns you to the main chat list.
So, unless there's something else you need to do...
e:
Make a Call works the same way.
I can create a community and a group chat in that, and even send messages to the group.
I can't add anyone to the group though, same "Give us your contacts" thing.