When you launch the action, you're presented with a choice between Timers or Logbook:
Then, depending on your choice, you're presented with a list of queries:
(Obviously, you will have to adapt for your own use. Yolanda cuts my hair.)
After you choose the query, Due opens with the search already completed. You can then start a timer or recycle an old reminder.
Here is the full string:
Here I will URL-decode the first list item (between
Timers= and the
The second list (the queries) is written as you would ordinarily compose a list in LCP. The important thing to note is that, since the Due URL scheme is not included in those brackets, it has to be URL-encoded after the