yes! there are many, mainly about fanzines and fandom history, but some fan art. They'll be under https://morgandawn.dreamwidth.org/tag/originated+on+tumblr

Or you can subscribe to the RSS feed of the full tumblr feed. Most of what I post on tumblr are reblogs of fandom stuff and art.

Bottom line: the cross-posting will calm down - I've had to do a lot of cross-post testing which can be deeply annoying. To everyone. I really wish DW would try to do some integration with other social media. All we have is "post by email" but it does not support any formatting or cut tags.