We can pick a background for a normal container, but not for a form container. Which creates visual tension when we try to use both a normal container (e.g. hosting a collection) and a form container on the same screen. For example, if we wanted to style the normal container as a card, we wouln’t be able to align the same visual style as with the form container.
Please add an option to pick the same background options for the form container as for the normal container 