Why is there no Crop Map tab when I create a succession?

Because the planting window places one planting at a time; a succession goes on the Crop Map, where you see every bed and every week at once. The Crop Map tab shows when you create a single planting or edit an existing one, and never for plantings grown in containers.

Once the succession is created, place its plantings side by side on the Crop Map. You can also open any planting of the succession later and use its own Crop Map tab.

The steps are in Assign plantings to beds.