Welcome to the community, @Xenia_Nealon! :grinning_face_with_big_eyes: I recommend reconsidering your base design. If the tasks are truly related, it’s best to put them all into a single table. You could then use something like a single select field—or a link field to a [Projects]
table—to identify which project each task is tied to. To see each project’s tasks separately, create custom views that each filter based on a single project. With all tasks in one table, a single Gantt chart could be created that shows the relationship between all tasks across both projects.