@rachelssm ...
When you look at any of the Canvas Release Notes or Deploy Notes documents, right above the "Table of Contents" section is a box. In that box is a link for "Features Q&A" followed by the name of the document and the date of the release. It also has wording right before that link similar to: "Looking to discuss the features..."
Regarding the "beta" environment...generally when Canvas Release Notes are published to the Canvas Community, the features are available to try out in your "beta" environment almost immediately or soon after. So, for example, the Release Notes for August have already been published to the Community. You can find those here: Canvas Release Notes (2024-08-17) - Instructure Community - 609012 (canvaslms.com). As you can see, there aren't as many updates in this release compared to the July release. But, you should be able to try out the updates (in this case, New Quizzes) in "beta". Testing things out in "beta" first allows you to post your comments to the Q&A board for that month so that Instructure employees can read your comments, and, if necessary, respond. The August release won't happen until August 17th, so you'd have some time to test things out beforehand and provide feedback...if you wanted.
Does this help?