I already asked this, but I'm not sure that you saw it. I asked you who do you ship with Carla?
Actually this is the first time you posted this question in my inbox. I guess Tumblr just ate the first one, typical Tumblr. This is a bit of a complex question so I'll have to get a long answer.
-I'm pretty neutral about shipping her with Gabe or Mateo*. Whenever I see a piece of content for one of those ships I'm just like “okay that's nice.” Don't get me wrong, I think she could theoretically get into a good romantic relationship with either of them over time, but I'm personally not invested in her getting together with either of them. But I do think that people are definitely allowed to ship them together if they want. (*Even though I'm more of a Rafictor shipper personally, I'm totally fine with people shipping Carla and Mateo romanticly, as long as it's not at the same time in the same story then there's zero problem with it).
-I have read a certain FanFic where she is shipped with an OC and I definitely ship them together in that because the way the author unfolds their relationship it's just really sweet.
-Occasionally I've seen people ship her with Antonia and it's a really sweet ship. After Coronation Day came out I ship Antonia a lot more with Ixlan, but it's still a cute ship.
-There is one side character in the show I think would be absolutely adorable with Carla but no one's ever really mentioned it before other than my own brain from what I've seen, so unless I actually write something for it I think I'll just keep it under wraps for now.
But to me the most important thing about shipping someone with Carla isn't the exact person, but that person is a good person. Because the most important thing is that she finds someone who she can get to know and truly trust before she gets a serious relationship with them (considering what happened to her parents).