@rmbl Sometimes I need the same, and I also feel that it is inconvenient to keep "unread" all notifications in order not to forget one of them.
Recently I started implementation of Group/Lists support in # And I see that creation of some personal "ToDo" group and adding any note/ activity to that group could help in such cases. Unfortunately AFAIK only # supports such actions, meaning that such custom groups of notes could be automatically synced between User's devices or even shared... Moreover, each "Social network" in # logically should have its own group...
So it seems that I will start from some device-local groups (like tags...) that can be easily viewed...
@fedilab