Yes.I'm having trouble remembering who Nadia is.
Is she that niece of MC Zaton?
I would say that the overall storyline there is about Rabiah(the sister in-law) as the LI and/or cucking Omar, likewise for some it might be argued that Omar is the LI or that the 3 characters of the sub-plotIf that's who you're referring to (please correct me if I'm wrong), then while I'd consider her a LI, no I wouldn't consider her a main LI.
Pretty much with her, it only resulted in lewd/sex scenes for most part and there were no significant story element, especially given lion's share of her arc's storyline was just Zaton telling that flashback between him, Zahra, and Zahra's sister.
She'll need an arc which stands on her own which isn't reliant on Zaton's flashbacks (which, let's face it. That section in essence is Zahra's story).
aren't LIs at all.