And the straightforward new configuration for collection paragraph

config/sync/core.entity_form_display.paragraph.drutopia_collection.default.yml

@@ -0,0 +1,23 @@
+langcode: en
+status: true
+dependencies:
+  config:
+    - field.field.paragraph.drutopia_collection.field_items
+    - paragraphs.paragraphs_type.drutopia_collection
+id: paragraph.drutopia_collection.default
+targetEntityType: paragraph
+bundle: drutopia_collection
+mode: default
+content:
+  field_items:
+    weight: 0
+    settings:
+      match_operator: CONTAINS
+      size: 60
+      placeholder: ''
+    third_party_settings: {  }
+    type: entity_reference_autocomplete
+    region: content
+hidden:
+  created: true
+  status: true

config/sync/core.entity_view_display.paragraph.drutopia_collection.default.yml

@@ -0,0 +1,21 @@
+langcode: en
+status: true
+dependencies:
+  config:
+    - field.field.paragraph.drutopia_collection.field_items
+    - paragraphs.paragraphs_type.drutopia_collection
+id: paragraph.drutopia_collection.default
+targetEntityType: paragraph
+bundle: drutopia_collection
+mode: default
+content:
+  field_items:
+    weight: 0
+    label: above
+    settings:
+      link: true
+    third_party_settings: {  }
+    type: entity_reference_label
+    region: content
+hidden:
+  search_api_excerpt: true

config/sync/field.field.node.collection.field_body_paragraph.yml

@@ -0,0 +1,55 @@
+langcode: en
+status: true
+dependencies:
+  config:
+    - field.storage.node.field_body_paragraph
+    - node.type.collection
+    - paragraphs.paragraphs_type.drutopia_collection
+    - paragraphs.paragraphs_type.image
+    - paragraphs.paragraphs_type.text
+  module:
+    - entity_reference_revisions
+id: node.collection.field_body_paragraph
+field_name: field_body_paragraph
+entity_type: node
+bundle: collection
+label: 'Body paragraph'
+description: ''
+required: false
+translatable: true
+default_value: {  }
+default_value_callback: ''
+settings:
+  handler: 'default:paragraph'
+  handler_settings:
+    negate: 0
+    target_bundles:
+      drutopia_collection: drutopia_collection
+      image: image
+      text: text
+    target_bundles_drag_drop:
+      drutopia_collection:
+        enabled: true
+        weight: 9
+      faq:
+        weight: 10
+        enabled: false
+      file:
+        weight: 11
+        enabled: false
+      image:
+        enabled: true
+        weight: 12
+      slide:
+        weight: 13
+        enabled: false
+      text:
+        enabled: true
+        weight: 14
+      update:
+        weight: 15
+        enabled: false
+      video:
+        weight: 16
+        enabled: false
+field_type: entity_reference_revisions

config/sync/field.field.paragraph.drutopia_collection.field_items.yml

@@ -0,0 +1,32 @@
+langcode: en
+status: true
+dependencies:
+  config:
+    - field.storage.paragraph.field_items
+    - node.type.article
+    - node.type.blog
+    - node.type.people
+    - paragraphs.paragraphs_type.drutopia_collection
+id: paragraph.drutopia_collection.field_items
+field_name: field_items
+entity_type: paragraph
+bundle: drutopia_collection
+label: Items
+description: 'Select any other content on the site to display as a list of teasers by typing words from the title and looking for the autocompletion of the content you want in the collection. You can change the order after adding each item.'
+required: true
+translatable: false
+default_value: {  }
+default_value_callback: ''
+settings:
+  handler: 'default:node'
+  handler_settings:
+    target_bundles:
+      article: article
+      blog: blog
+      people: people
+    sort:
+      field: changed
+      direction: DESC
+    auto_create: false
+    auto_create_bundle: article
+field_type: entity_reference

config/sync/field.storage.paragraph.field_items.yml

@@ -0,0 +1,19 @@
+langcode: en
+status: true
+dependencies:
+  module:
+    - node
+    - paragraphs
+id: paragraph.field_items
+field_name: field_items
+entity_type: paragraph
+type: entity_reference
+settings:
+  target_type: node
+module: core
+locked: false
+cardinality: -1
+translatable: true
+indexes: {  }
+persist_with_no_fields: false
+custom_storage: false

config/sync/paragraphs.paragraphs_type.drutopia_collection.yml

@@ -0,0 +1,8 @@
+langcode: en
+status: true
+dependencies: {  }
+id: drutopia_collection
+label: Collection
+icon_uuid: null
+description: 'Allows grouping referenced content together.  For instance, an Issue collection could use collection paragraphs to group articles into three themes within that issue.'
+behavior_plugins: {  }