This is adorable. Could someone ask the author if they'ed like to start a Lemmy community for their portfolio, or even just this comic series on the Fediverse? I'd love to follow it, but I'm not on Tumblr.
Good news: Tumblr is working on implementing ActivityPub (the protocol that Lemmy uses to integrate with the Fediverse).
Bad news: The article is from November 2022, so it's going slowly. On July 5 they said they are still working on it, but not ETA (AFAIK).