It shows only weeks and months for the years 2025 through 2028, that's four years (not three).
The only choice you have is to choose the starting month-year and the finishing month-year.
Do not change the timescale after tasks have been placed in it
FigJam seems to assign random anchor points to tasks, milestones, and swim lanes, causing them to move in random directions as the time scale or page height is changed.
How to change the time frame after tasks have been added
Don't. Instead, create a new blank TimeTable, adjust the dates and height as needed then select everything from your old schedule, minus the timetable, and copy/drag it over to your new one.
