Create a New CPT Post
- Login in to your MainWP Dashboard
- Go to the MainWP > Extensions > Custom Post Types page
- In the Custom Post Types box, you will be able to see all registered CPTs on your MainWP Dashboard
- Locate the one you want to publish to your Child Site(s)
- Click the Add New button
- You will be prompted to the Add New screen
- Enter the CPT post Title, Body, and metadata
- Select your Child Sites where you want to publish
- Click the Publish button
Source Article:
https://kb.mainwp.com/docs/create-a-new-cpt-post/