Project dashboards allow tracking the deployment across multiple channels. I'd like the same capability on the MAIN dashboard... preferably as a filter.

as commented in https://octopusdeploy.uservoice.com/forums/170787-general/suggestions/11719014-add-channel-to-dashboard

if proj A has chans A1, A2, and A3, I'd like to be able to see all or some (perhaps only A2/A3) on the main/home dashboard