Hi,

In the Planning app, as you hover over shifts or the planning board view, an icon will appear. This icon allows you to either create a new task or select an existing one. If you choose the latter option, a popup will open displaying all your existing tasks. From there, you can drag these tasks onto the planning board and rearrange them as needed.For more information, you can refer to our Blog Odoo 14 Planning.

Hope it helps