Where can I find all the changes happening with Microsoft Copilot after the latest updates?

While I tried to read from https://learn.microsoft.com/en-us/copilot/overview there are still a lot of changes I couldn't confirm whether those changes are due to Copilot latest updates or not.

A few changes I identified but don't have enough clarifications are:

1. The setting button is not available, we cannot set language setting
2. Add picture function is missing
3. Summarization function is mentioned as coming soon, there is no tentative timeline for it
4. Web search setting

I have been crawling the learning hub but I could not find a good documentation of all the updates to Copilot, please advise.

Thanks,

Wan Yee