Getting an overview of grid/kanban boards

Hi there. I recently stumbled across appflowy, and was wondering what the general approach is to getting an overview of multiple grids.

In particular, I’m looking for a way to achieve the following: have dedicated per-project kanban boards and an “overview” kanban board that consolidates waiting/ongoing/done tasks from all project kanbans.

Is there a way to get a “fused” view of multiple kanban boards (if their structure in terms of columns is identical)?

If not, is there another way to achieve this? I was thinking of having a single underlying grid containing tasks for all projects, and creating the overview kanban board as unfiltered view of the underlying database and the per-project kanban boards as views of the underlying database that apply a filter to select for the corresponding project.

Unfortunately, I could only find a way to apply a filter when I’m viewing the underlying grid as grid. When I view it as Kanban, I could not find a way to apply a filter.

Any way to get this done? Thanks!