I had the same idea/question. A visual timeline in not in BricksForge (yet). Just under the hood as it seems. I suggested putting it in the BricksForge panel in some way (either by method or full overview of things happening on the page, what ever makes more sense for BricksForge).
Sidenote: GSAP is certainly a market leader, but TheaterJS (Berlin based) is open source and would offer a timeline module. Don’t think it is happening here, but it certainly is interesting as they have been funded with some millions of Euros. Impressive for an open source project.