Putting a ticket into a sprint is the same as putting it into a queued stage of kanban for purposes of reporting, although the reported number will differ (“this sprint” vs mean cycle time with percentile bounds.) Both methods can have unordered backlogs where something can sit indefinitely.

(Many orgs are understandably nervous to automatically report a simple number as an estimate; in those cases, you could translate cycle time into a date range estimate so long as you’re not also expected to report “we’ve started” etc. since those won’t necessarily line up.)