Warning! Timeline view for Free and Pro plans are limited to 3. keep this is mind if you’re planning to duplicate this example. I recommend taking some inspiration and copying the formula into your own timeline database if this limitation occurs.
Timeline Progress
Progress Formula
if(empty(prop("Child Progress")), "", slice("⏣⏣⏣⏣⏣⏣⏣⏣⏣✓", 0, prop("Child Progress") * 10) + " | " + format(prop("Child Progress") * 100) + "%")