I’m excited to announce that the new Large Gallery view, allowing users to see up to 49 participant in a meeting, has started rolling out! Large Gallery will release as an optional (preview) feature that can be turned on at any time during a meeting, and will be available in desktop Teams client on both Windows & Mac. We are pushing the updates via a cloud update. The minimum desktop build needed is 19173 or later. If you have this build you will see the new feature once the cloud update is pushed to you, over the coming weeks.
You can read more about Large gallery view, Together mode, as well as other new meetings experiences here: https://techcommunity.microsoft.com/t5/microsoft-teams-blog/new-meeting-and-calling-experience-in-microsoft-teams/ba-p/1537581.
For more details, check out the Roadmap item: https://www.microsoft.com/microsoft-365/roadmap?filters=&searchterms=65333.
Alex & the Teams team
The ability to delete Bot messages feature has been added to the backlog. Thank you for your feedback!
Updating status based on comment from community member. Will update again when we receive further giving info on the scenario.