Err, i feel you're making up some sort of headcannon that isn't quite there in the game? Axel is pertty explicit about the Wildcat thing in his texts:
Python:
x "{i}Anyway, I just wanted to update you on the modeling agency situation.{/i}"
x "{i}I presented them your portfolio and they liked it, but they were only interested in hiring a new model for the summer campaign and they gave that spot to another candidate.{/i}"
(...)
l "{i}Just one more thing... Out of curiosity, who was the girl that was picked by the agency? Was it Ivy?{/i}"
x "{i}No, it's the other girl I've been working with. Cindy.{/i}"
l "{i}I see... Ivy won't be happy about it.{/i}"
x "{i}I tried to get her in, but her style isn't quite what Wildcats is after. They're looking for something more... sophisticated.{/i}"
Wildcats was interested in hiring
new model and that requirement ruled Lena out. Not having her portfolio presented late, or anything. So we can conclude from this that Lena does have some modeling presence that goes beyond "instagram girl very few people know of" and Ivy likely even more so, given she's working more actively on her modeling career.
The "sophisticated"/"sensual, artistic" thing is probably right, although i suspect it boils down more to Cindy not (yet) being used/comfortable with being openly sexual with her posing. Though it, again, strengthens the idea that Ivy and Lena have some modeling presence that's known to more than few people, and in this case that worked against Ivy -- if they
were unknowns then having more bold shots in the portfolio would matter little; modeling is largely about presenting required persona after all.