Filters: option to show "blocks that contain tasks"

With filters (the filter icon in LINKED REFERENCES): would be great to have markers in the filters. eg: filter and display only linked references that contain a TODO/NOW/LATER/DOING/WAITING.

This is super useful when building an agenda for talking to a person, for example (“show me all outstanding tasks when I get on a call with person X”).

This has got a bunch of votes here in discord.