Hello,
In October '17 there was this post with the topic ‘Embedded Timeline not showing retweet content’.
Someone from the Twitter-Staff responded:
[…] there’s currently no schedule for an updated version that would resolve this.
Our twitter account is representing our lab for medical Image Computing in Regensburg, Germany.
We would be very pleased if you would fix this issue or at least schedule it.
Sincerely,
ReMIC