This has been obsoluted, please use Native Elementor Form Support
1. Click 'Post' and 'Add New'

2. Click 'Edit with Elementor' Button


4. Click 'Add Item' Button

5. Select the Type as 'Hidden' and Give a name for Label

6. Click 'Advance', Give a name to Custom ID and then Click 'PUBLISH' button
🥳Now You are ready!
