They couldn't help someone who couldn't help themselves.
I think we're all glossing over that the OGFL was a stalker and mentally unwell. She took it out on the ML, and that did not help her case. Its understandable why OGFL was like that, ofc, but we have the benefit of flashbacks and outside knowledge. In their situation they saw her as an imperial princess, an enemy, and that dictated how they saw her. If this were reversed and the ML was the love obsessed stalker, we'd all have a fit that he's gross (some of y'all would still simp tho) and a red flag.
New FL is making waves and her actions are leading to new outcomes. They are seeing 'her' for the first time because she's taking action.
Yes, ALL of them (except bibi and our precious FL). Like they know what is happening to our FL in her last life but just pretended not to notice for their "survival" or whatever which is understandable BUTT now that the FL changed they can actually make room and and protect her despite still having to worry about survival??!?!
It's infuriating since that means they have the capacity to help the FL before but choose not to