Add migrated field instance settings

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

@@ -0,0 +1,22 @@
+uuid: 8a4aa987-754f-483d-8b05-a5db0572e9f7
+langcode: en
+status: true
+dependencies:
+  config:
+    - field.storage.node.field_description
+    - node.type.event
+  module:
+    - text
+id: node.event.field_description
+field_name: field_description
+entity_type: node
+bundle: event
+label: Description
+description: ''
+required: false
+translatable: false
+default_value: {  }
+default_value_callback: ''
+settings:
+  allowed_formats: {  }
+field_type: text_long