Diarized
Time blocking when your work lives in Jira or Linear
The issue tracker is the team's, the calendar is the team's, and the hours where you actually write code belong to neither.
What Diarized does about it
Diarized reads your assigned issues and writes focus blocks into the free time around standups and reviews, with a link on every block explaining why it landed there.
Reads the app you already use
Jira
Linear
ClickUp
Those are the ones people in this situation tend to keep. Diarized reads 11 task apps in total, and your tasks stay in whichever one you already use.
What it will not do for you
It schedules the issues already assigned to you and takes no view on what should be. Sprint planning, estimation and triage stay exactly where they are.
Everything else that was looked at and refused, with reasons.