Hi Andrea Dias Da Silva E Melo,
Greetings. Thank you for posting the thread to our community.
Based on your description, it seems you want to compare your presentations in PowerPoint for Mac.
As far as I know, I’m afraid and sorry to say that the compare feature is not available in PowerPoint for Mac, and it is only available in PowerPoint for Windows. Here is the official support article as reference for you: Track changes in your presentation - Microsoft Support.

In that case, I’m afraid and sorry to say this situation is due to the product design. And Very sorry for this limitation you’ve encountered.
Personally, I’m totally understanding and agree about the convenience of having compare feature in PowerPoint for Mac, it is definitely good addition, and other users also have similar feedback to it. Due to this situation, I sincerely recommend you go to Feedback community to vote this similar feedback: Compare option for Mac: Please bring it back · Community. Our product team is in charge of the site, and they constantly check customer reviews and feedback, The higher votes, the more attention the related team will pay on. And a lot of the features are developed and improved based on customer feedback.
Please accept my apologies that as moderators in the community, we are not supported for the product design and have limited resources for the advanced info for Microsoft products. To help you send your feedback to the related development team, we have redirected you to the correct path.
At the same time, I will keep this thread open, so that other members and experts in our community could share their ideas in this thread.
Greatly Appreciate for your patience and understanding, and Hope fully Microsoft will make improvements soon.
Hope you having a nice day and wish you a brilliant year ahead as well!
Sincerely,
Harry | Microsoft Community Moderator