Can I adjust tracked time after it was tracked?

(todo) Yes. Open the worklog and edit the start time or duration—Ticker updates the entry in Jira (and Tempo, if you log there) the same way it would for a new worklog.

Stopped timers and past worklogs stay editable. Change the time, save, and the remote copy is updated. If you only meant the clock that’s still running, see “Can I update the time on an active timer?”