Oh, I would be interested in that, too. For now, I’ve found a workaround for a similar use case: I track various projects in Obsidian, and open tasks I need to remember are only a small part of that, but might randomly occur on several notes. When jotting down an open task, I tag it #todo For a comprehensive overview, I have a note called “To Do”, which consist of:
```query
tag:#todo
```
This lists every open task in every document, but still gives me enough context by displaying the project they belong to.