Over the last year or so, Microsoft has been slowly (and partially) shutting down the UserVoice feedback sites for various Microsoft 365 products. They had promised a replacement, but there hadn’t been much in the way of details… until now.
Feedback for Microsoft 365 is now in preview mode and is available for use. Instead of going to multiple different UserVoice sites, you now just go to a single site where feedback forums for all the Microsoft 365 products can be found in a single site. You can search for existing feedback, add new feedback, and upvote items that are important to you.

For more information, check out Introducing Feedback for Microsoft 365.