Connect 2 Wordpress sites using JWT authentication/Oauth2 - simple showcase

Assume you have 2 wordpress-instances (WP >=5.7): 1) [login to view URL] 2) [login to view URL] We want to allow user 'Paul' (registered at [login to view URL] as an contributer) create a new post on [login to view URL] by accessing and submitting a simple form at [login to view URL] Prerequisite is that Paul has signed in via single-sign-on (SSO) on partner-blog.com. Required are: - Secure (!) authentication using JWT - Authorization via Oauth2 - Use of WP rest api endpoint /wp-json/wp/v2/posts Two plugins are to be provided (one each for [login to view URL] and [login to view URL]) that meet these requirements. You can use/customize already available WP plugins like - WP OAuth Server (OAuth Authentication) - Justin Greer/Dash10 Digital - WP Simple Single Sign On - Justin Greer/Dash10 Digital - JWT Authentication for WP REST API - Enrique Chavez Both WP instances [login to view URL] and [login to view URL] are self-hosted. We do not want to have any third party services included. -- WP rest api / oauth2 experienced people only please!