Hello, Greetings! of the day. As mentioned in project description, the plugin wpDiscuz and plugin LearnDash are used on your Wordpress website. Your requirement is to setup plugin wpDiscuz, so that comments section is displayed on lesson page in plugin LearnDash.
Regarding implementation of this comments section functionality, using plugin wpDiscuz and plugin LearnDash, I have checked the details at page links, provided in project description. I have much experience in working on projects, using PHP, Wordpress. Your work will be done, according to requirements.
Thanks.