Q: How to filter for triangulated groups with a specific type of hint?
A: Click on the drop-down menu at the top left corner
Upon clicking on it a list of different types of tasks will be presented:
In the example above, the 2nd entry (Family Tree URL) was selected (see gray background).
This will filter only on triangulated groups that have at least 1 open tasks with a hint for family tree URL that one of your DNA cousins in that specific TG has posted.
Please note that it's likely that there are still other types of tasks open for the same triangulated group. So the number presented is for all tasks and not just the one that you filtered for!