I am not sure I would call. Put in a regular WS or GS per your preferences. Run the trip you want through the rules auditor. If you do have a 23k obligation you are free of that 6 hours after scheduled report and free to do anything you want. With the current mess in scheduling there is a chance they won’t get around to assigning you recovery before the window ends. If you call they may tag you on the spot. The gotcha is that if not assigned flying prior to the original report you must be promptly available during that 6 hours.

Edit: If this was a cancelled flight due to IRops you have a 23k obligation.