Ability to reflect multiple dates per feature on custom roadmaps

On the custom roadmap, although I can create custom date fields which correspond to the delivery dates of multiple platforms of a feature, I don't have the possibility to display them alltogether on Gantt view so as to have an overall view at a glance when we are delivering on all platforms. So, our problem is that in the visualization on the Gantt chart we get only the context of release dates of each platform which is quite confusing. That's why we would like to display field names as well. Attached screenshot