Dear Zaur Meherremov,
Good day! Thank you for posting to Microsoft Community. We are happy to help you.
As per your description, we understand that you are trying to add zoom tool by the iframe code in PowerPoint.
We've done a lot of searches and have not found an out-of-box way to achieve this in PowerPoint for now. For the situation you encountered, we do understand the inconvenience caused and apologize for it.
Considering that our category focus on general troubleshooting and built-in features of PowerPoint, to check if there is any customized way to achieve this and seek further assistance on the iframe code, we'd recommend you repost to Office Development - Microsoft Q&A with PowerPoint tag and Office Deployment tag. Members and engineers over there are proficient in the knowledge of PowerPoint customization and development queries. They will focus on the specific situation on your side and provide specific suggestions for you.
Apologies for redirecting you to a different community, as members of the published category focus on general queries with PowerPoint and have limited knowledge about iFrame code; So, to get quick and better assistance, we redirect you to the right one.
Meanwhile, we will also keep this thread open to let other community members share suggestions here.
Community members who have similar experience are welcome to share insights and suggestions here.
Thanks for your understanding and cooperation! Hope you keep safe and healthy always.
Sincerely,
Rhoda | Microsoft Community Moderator