Hi Pablo,
Thanks for posting in the community.
According to your description, you want to use multiple tables to create a Pivot Table on Excel for Mac. I am afraid, not like Excel for Windows, you can’t add the table to the Data Model. Based on my search, here is a thread where members discussed the same issue. Please check if it helps.
Base on the situation, I would like to invite you to vote for the suggestion in our UserVoice community where other members voted for the same idea. It’s the platform for us to hear your voice and improve our products.
Appreciate your understanding and patience.
Regards,
George