Data Scraping on internal Social Media

Hi Guys,

i want extract data from a website similar like Facebook (only the companys internal Social Media)
I need to extract all Posts with the comments.

When trying that, i can only extract the posts which are on the first page, so no old ones.
Also, when the post is too long, i can’t extract the ehole text. (… continue gets extracted rather than the post).
Furthermore, i can’t extract the comments to each post.

Do you guys have any reccomendation on how do solve those problems?
Thank you!