X (Twitter)
Request an archive of your X account data, and import the downloaded archive file. You can either import it directly or extract it first and then import the root folder.
Timelinize will import the tweets, media, and DMs contained therein.
Twitter's archive does not include any usernames or display names of any other users; nor does it contain quoted tweet contents. Thus, when importing DMs, Timelinize will create many unnamed entities with only a Twitter account ID.