Cara Dune was only a mildly interesting character at best.
She had a whiff of an interesting backstory, but also some things that didn't make any sense.
To whit: she was supposedly a big hero of the rebellion, but then apparently got in trouble with the New Republic and is/was wanted by them.
For a former war hero to go to being wanted by the new government would require a fuck-up and or criminal act on such an epic level that basically there's no way she's actually a good person. But the show just ignored all of those implications.
Then she gets back in the good graces of the New Republic and becomes a marshall. Which is fine, but again they're just ignoring whatever bad stuff she did to get on the shit list in the first place.
Anyway, ramble aside and real world actress considerations aside, she was acceptable enough as a recurring character, but not remotely essential to the show and it's perfectly fine if she never shows up again.
She isn't remotely compelling enough to bother bringing her back in another form, either via recasting or animation.
The fact that Carano arguably tanked a spinoff show in which she was set to star is pretty funny.
But if you're really that much of a fan, Galaxy's Edge just recently started selling a Dune-esque "new republic marshal" badge, so the character's legacy lives on in a small way (even though her action figure will never be re-released.)