Add migrated field instance settings

drupal10/config/field.field.node.event.field_date.yml

@@ -0,0 +1,21 @@
+uuid: dcd0ef5c-6fb2-4e3f-b6e3-9aad963fc84a
+langcode: en
+status: true
+dependencies:
+  config:
+    - field.storage.node.field_date
+    - node.type.event
+  module:
+    - datetime
+id: node.event.field_date
+field_name: field_date
+entity_type: node
+bundle: event
+label: Date
+description: ''
+required: true
+translatable: false
+default_value: {  }
+default_value_callback: ''
+settings: {  }
+field_type: datetime