^^ The issue comes then...
Where exactly are they?
The most common places I see lots of Sequel-related content are fanfic sites and Tumblr, which is a very specific subset of the internet as a whole and pretty insular, I'll be honest.
(And this is coming from a guy who is both a semi-active fanfic writer and who has a Tumblr)
Like you have that tight-knit community, sure, but it's, again, a fairly small portion of the utterly gargantuan fandom Star Wars has a whole.
And indeed, one of the best ways to determine if a fanbase is thriving in terms of the content is seeing how much fanfic there tends to be.
Or fan content in general, really.
And here's the kicker: The Sequels kinda don't get much exploring the actual world presented by the Sequels, even in fan content.
Which is telling for how much those fans care about the era the Sequels are set in: they appreciate the characters created, far more so than Disney/Lucasfilm seemed to, but in contexts that aren't the Sequels.
And if the timeframe you present isn't interesting, good luck forming an expanded universe off of it, which is by and large the absolute best way of generating a massive fanbase for, well, anything.