Add ds layout file to subtheme

subtheme/_bootstrap_barrio_subthem.layouts.yml

+bb_cardbasic:
+  label: Card basic
+  category: Barrio
+  template: templates/ds/layout--ds-card-basic
+  class: '\Drupal\ds\Plugin\DsLayout'
+  regions:
+    first:
+      label: Content
+bb_cardtopimage:
+  label: Card top image
+  category: Barrio
+  template: templates/ds/layout--ds-card-top-image
+  class: '\Drupal\ds\Plugin\DsLayout'
+  regions:
+    first:
+      label: Image
+    second:
+      label: Content
+bb_cardimageoverlay:
+  label: Card image overlay
+  category: Barrio
+  template: templates/ds/layout--ds-card-image-overlay
+  class: '\Drupal\ds\Plugin\DsLayout'
+  regions:
+    first:
+      label: Image
+    second:
+      label: Content
+bb_cardheaderfooter:
+  label: Card header footer
+  category: Barrio
+  template: templates/ds/layout--ds-card-header-footer
+  class: '\Drupal\ds\Plugin\DsLayout'
+  regions:
+    first:
+      label: Header
+    second:
+      label: Content
+    third:
+      label: Footer
+bb_card3stack:
+  label: Card three block stacked
+  category: Barrio
+  template: templates/ds/layout--ds-card-3stack
+  class: '\Drupal\ds\Plugin\DsLayout'
+  regions:
+    first:
+      label: First
+    second:
+      label: Image
+    third:
+      label: Second
+bb_media:
+  label: Media
+  category: Barrio
+  template: templates/ds/layout--ds-media
+  class: '\Drupal\ds\Plugin\DsLayout'
+  regions:
+    first:
+      label: Image
+    second:
+      label: Content