Dear Arvid,
Good day, thanks for querying in this forum. We’re happy to help you.
From your description, it seems that you want to use Copilot in Word for Mac and PowerPoint for Mac.
If my understanding is right, according to official article, Copilot is available in Microsoft 365 apps.
You can refer to steps below to check if you can enable Copilot, as shown below:

For more details, you can refer to this article: Copilot Pro: Microsoft 365 apps and your privacy - Microsoft Support
If the suggestion above doesn’t work, to better understand your situation, could you provide the information below?
- Could you provide the version of your PowerPoint? You can go to PowerPoint > About PowerPoint and provide the screenshot of it.
- Could you provide the version of Mac OS?
If the scenario above is not consistent with yours, you can also post back and point that.
Sincerely,
Sukie | Microsoft Community Moderator