I had peer reviews and the only place they can be found are under "recent activity." Once this was deleted from here, I could not access it anymore any place else.
Hello, Caroline Battin, and Welcome to the Canvas community.
As far as I am aware, it is not possible to "recover deleted recent activity" entries that have been removed. Hitting the "x" for an entry is telling the system you don't want to be reminded of that particular entry. However, you should still be able to complete peer reviews by accessing the assignment to be reviewed. Check out these helpful guides on finding and completing peer reviews:
Retrieving data ...