Would really need this feature to allow a team to have a single backlog while supporting tasks which may live in different projects - and still have the possibility to view their work on the timeline.

As a workaround, we support cross-project visibility in Gantt style views here: https://www.visor.us/ We're a third party platform that is bidirectionally integrated with Jira. You can import JQL style and see your projects on a timeline view.

We also support seeing the child tasks within the parent task on the free version as well.

We've moved to SAFE and this would really help us coordinate cross project efforts, and blockers

Definitly a must have.

I understand that advance roadmap allow to have way more capabilities, being able to work in Safe, with release train, being able to coordinate all feature teams.

But sometimes, not being in Agile Safe, not really coordinating the teams, but still having dependencies, we do need to track theses kind of "Epics" which are involving multiple projets (event if 90% of the work is done on one projet, and 10% on another one).

Having Jira Premium, with Plan would be way too complex (we do not really need the Feature/Epic/Story levels) and expensive for our business. Not being able to track theses type of dependencies force us to find another way to track roadmap projects has the current project Roadmap is inaccurate at the end as we can't see if it's an Epic having dependencies without being able to see "child Story from others projects".

+1

I really need to be able to see subtasks within Stories in the Roadmap

Hi there, Thank you all for your valued feedback. 

To set some context - The basic roadmaps feature on Jira Software Cloud is targeted at a single software team with one project per roadmap. Currently, this view only works with issues from the backlog associated with one project. https://support.atlassian.com/jira-software-cloud/docs/set-up-the-roadmap/

Cross-project planning is only possible in Advanced Roadmaps which is targeted at "teams of teams"/software organization level planning, which is included with Jira Software Premium and Enterprise subscriptions. More here on how to set up your first plan: https://youtu.be/xJ-RmFwEVjM .

Separately, we hear, and understand your concerns about having better visibility of the epic progress (which may include issues from another project) on the basic roadmap view. We currently do not have this on our roadmap in H1, 2022, but we are constantly reviewing this based on any specific use cases provided on this ticket. 
Please note, if you would like to vote for this request, instead of commenting - you can easily click "vote for this issue" at the top right of the page. 

Thanks again for your feedback and time spent articulating the needs of your team. We really do value it.

Regards,

Rathesh Richards, Product Manager. 

When will we have this cross-team feature?

+1

+1 From a visual perspective it'll help display the timelines per task within the parent ticket