The team has delivered improvements to the New Meeting experience in Calendar such as optional attendees, richer custom recurrence UX, as well as enhanced meeting RSVPs.
To learn more about RSVPing to meetings in the Teams Calendar, how to create a recurring meeting, and the new meeting scheduling experience including the scheduling assistant, please visit https://support.microsoft.com/office/schedule-a-meeting-in-teams-943507a9-8583-4c58-b5d2-8ec8265e04e5.
if you have an existing post that you want to show in a different channel, you can edit the message and cross-post. This will add the top-level post to the different channel, but will not include the full set of replies. We will keep this request in mind as we evolve the cross-posting feature in the future and update if the status changes.
Details on cross posting can be found here: https://support.office.com/article/cross-post-a-channel-conversation-in-teams-9c1252a3-67ef-498e-a7c1-dd7147b3d295.
This continues to be on our backlog due to prioritization of other work items. We will update when there is more to share.