Probably none have gotten their own show because Disney is thinking about the direction to take. We've gotten a bunch of books on sequel characters, comics on them, etc. There's also the Star Wars Lego Holiday Special, Forces of Destiney, Resistance show, etc. They've done things in the sequel era.
But I digress, it does go on to highlight the silliness of Star Wars. All TV Shows/Movies except for The Acolyte take place in a 67 year period. We know the Republic lasted for over a thousand years. So like why all the focus on this small era when there was so much more time to screw around with.