Hi @Guilherme Fuzil
Welcome to our forum!
Based on my research, it seems that the room finder in new Outlook is currently not available, I am afraid that you need to switch back to the legacy Outlook or use Outlook for Web version to continue to use this feature.
Please kindly understand that many functions are not designed at present. To get this feature more quickly, I have found a post in feedback collection website, and you could vote for it. Many features of our current products are designed and upgraded based on customers’ feedback. You can also make suggestions on that website and hope Microsoft will notice this in the future.
Thanks for your support and understanding!
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