Add volume missing from Dashboard

The option to add or delete volumes in dashboard is gone. I am running OS X 11.2.1, Dashboard 3.5.2. I have a Drobo, Drobo 5D and a Drobo 5D3 connected to my MacMini. I removed and reinstalled Dashboard with no change. I’ve shut down all Drobos and MacMini, brought up the Drobos and brought up the Mac mini with no change. The only option from the Volumes menu is Rename Volume. What happened to add and remove volumes??