Magento you can add a hidden field to the ui_component XML file with the use of attribute formElement=”hidden”.
The hidden field is used mostly for an entity_id field.
Entity_id field is used to fetch the records of a specific object.
<field name="entity_id" formElement="hidden"> <settings> <dataType>text</dataType> </settings> </field>
When you check the UI component field using Browser Console, It’s available but it’s not visible on the form.
A hidden field is used to post the data to the server with value.