Course Pulse lets you view and filter through a log of edits and changes on any course. You can see what type of learning element (activity, mapping, CLO, etc.) changed, who performed the change, and the date and time it was changed. You can also filter by the following categories: type of edit, specific user, date or date range when the changes were made.
Note: This feature was activated in the v2.0 release, so you will not be able to see the pulse for a date prior to this December 2020 release.
Want to know more about Pulse? Check out this article: How do I see a history of changes on my course (level-4 object)?