I know some people are disappointed Hob's not in more of The Sandman (yet) but actually, as a fanfic writer, there are upsides to this.
Hob is totally central in one self-contained episode, his section is about 30 minutes long and you don't need to have seen much else of Sandman except the first episode to understand everything you need for it. That's a pretty low barrier to entry, just over an hour of time commitment to bring new people into the fandom.
On the one hand, yeah, sometimes that means sustaining engagement is harder because there isn't a ton of material to work with, but I've seen popular ships survive on much less than 30 minutes of dedicated screentime to the ship. Newt/Hermann in Pacific Rim might cumulatively as characters get about 35 minutes, across both movies. Arthur/Eames was a super popular ship in Inception which probably had more like 10 minutes. It's really more important that the world is expansive enough to create fanwork scenarios where they interact than that they've got a ton of time together canonically. Hob and Dream have 600+ years of history to work with and the entire Sandman story to play around in, much like Aziraphale and Crowley.
Conversely, there are tons of ships I'd love to get into, but the time commitment is HUGE. The Magnus Archives comes to mind, it's hundreds of hours before one has enough grasp of the story to understand the main ship and all the fanart. There are others too where I'm sure the fandom would be bigger if it wasn't so hard to catch up, despite the fact that means the ship has a ton of material to work with.
All I'm saying is, Dream/Hob have actually a pretty good foundation for a fandom ship, more dedicated time in the episode they're in together than many other popular film ships, and the promise of more content between them. There's a low barrier to entry for others to learn everything they need to know about the ship and jump on board. From a fan creator perspective, that's pretty great!