
Spoliers...
She(fl's mother) isn't the sainteess actually.She was appointed as a TEMPORARY saintess by the goddess with minimal power until leticia, the true saintess awakens her powers. That's why after leti's birth her power started to decrease. But as she wanted more and more power she made a deal with darkness(main villain of this story) to have more power.
As she isn't the original saintess..she didn't have the power to have her wings. So she brainwashed some random A**holes to be her wings and the only real wings she have are ahwin (also brainwashed) and noel..Ahwin will soon realize that leti is the saintess. And noel wasn't brainwashed as she's too pure. The crown prince of the empire who has a whole sad backstory of his own is also a wing who will join leti , and as the story goes by leti will have all her wings. Hope this answer your questions.(⌒▽⌒)

More Spoilers
The fake saintress (fl's mother) actually had 4 real wings in her corner, 3 of them being brainwashed (Noel wasn't however). The real wings coming from the fake saintress were the two you mentioned above, as well as Callisto (which is the sad crown prince you mentioned I think?) and Kylas.
The other "wings" of the MC/fl's mom aren't actually wings at all and the reason why they are so twisted isn't just bc the mom, but due to the Darkness (which is the main antagonist here and acts basically as the badness to the other god's goodness (evil vs good)) appointing them and giving them power. And I think the mom also made a deal with the Darkness and corrupted by it, or something like that. I'm not 100% sure.
I don't want to give away too much about the other wings of the MC, but the 3rd and 9th wing of her's and awesome and I can't wait to see them come to life in the manhwa (I'm not sure if I spelled that right or not), especially since I only read through the spoiler page.
Spoiler Page Link: https://forum.novelupdates.com/threads/a-way-to-protect-you-sweetheart-%EB%8B%A4%EC%A0%95%ED%95%9C-%EA%B7%B8%EB%8C%80%EB%A5%BC-%EC%A7%80%ED%82%A4%EB%8A%94-%EB%B0%A9%EB%B2%95.122269/
I’m starting to think that the saintess was most likely a true saintess at first in the beginning but as time went by she became corrupt and lost her saintess powers and was passed to Letica when she was born and most likely the reason why noelle doesn’t see the saintess like the other wings do is most likely because she arrived later than the rest and arrived at the point when leticia’s mom’s saintess powers were really weak