FieldStorageAddForm has new structure

\Drupal\field_ui\Form\FieldStorageAddForm (field_ui_field_storage_add_form) is now structured differently. After the changes, label input is displayed before the field types. The field types are grouped, and selection uses radio buttons rendered inside cards. A card is either a group (Plain text, Number, File upload) or a field (Boolean, Email). If a group is selected then the fields of the selected group will be displayed below as cards as well. This means that form alter implementations may need to be updated.

To avoid additional form alter updates in future releases, it is recommended to alter the field types using hook_field_info_entity_type_ui_definitions_alter. Refer to this change record for an example.