I'm seeing the same thing on my client here. Hovering over the video call or voice call button on a contact card shows the message "Your Office 365 license doesn't include this feature. Contact your admin to change your license." I haven't heard from other users, but I'm one of only 2 people in the org using skype or teams for calling, so most of our users wouldn't be going for the call button.
You can't see my cursor in this screenshot, but I was hovering over the voice call button to show the message:
Incorrect Hover Text on Video / Voice call buttons