Set featured image and post date when creating post via API

Hello.
I want to create post via API and I need to set featured image and post date for example 2020.02.02

Your best bet for this is the Admin API Documentation:

First of all i read this document but I didn’t find info about featured image and post date

All the fields are listed in the post object section - i.e. feature_image, feature_image_alt, feature_image_caption, and published_at