I would say to give her space and not push too hard. I know it's hard, but the more you push someone who has bi-polar, the more you'll push them away I fear. I'm no expert on this by any means, but it's what I've kindof realised after having been ghosted myself this year.
I have a friend who I suspect has bi-polar. She's told me in the past that she suffers from depression, etc. And after having a great year-long relationship (mainly online due to distance) back in April, she just disappeared. Our relationship wasn't romantic, but there might have been a tinge of that from both sides. Still a bit confused about that!
But yeah, out of the blue, she blocked me from social media, etc. Everywhere! Seven months down the line, I've tried to contact her multiple times and ways, but with no responses. So I've decided to let things lie for now as I don't want to push it and be that 'annoying person' who keeps popping up...
Good luck with your daughter. I would just say take things very slowly and let her come around in her own time :)