Pods – cannot extend existing post

Hello,

I’m little bit lost with pods as I would like to add radio buttons and checkboxes in my newly created post (pod: school).

The post (pod: school) doesn’t appear in the list of Post Type in “Extend an Existing Content Type” with Content Type’s list set to “Post Type (posts, Pages, etc)”. Is it normal ?

I try to follow the method explain here :

To add this type of field, just extend the post type you need

https://pods.io/forums/topic/how-to-create-pod-or-field-with-radio-buttons-or-checkboxes/

Thank you,