if you create a screen flow, you can see which shapes are available (it's a limited set). The goal of the screen flow is to divide 1 task for a user that has to capture many fields over multiple screens. As such, the assumption is that it's finished by 1 user. I had an SR open for this but the ultimate response was that this is intended behavior... An alternative is create multiple assignment and configure the flow actions in the post-processing also to look for assignments in a workbasket.
I understand that Screen flows are meant for data gathering forms. If the goal of the screen flow is to divide 1 task for a user that has to capture many fields over multiple screens, then it can be achieved even by having multiple tabs in a single section of any flow action, isn't it? Then when exactly we have to for screen flows