I think pp who have suggested an anxiety or mh issue (or just a home-sickness/unhappiness problem ) are possibly on the right track. I know from experience that it is possible to be very happy with one's spouse, and at the same time miss one's family dreadfully, and feel very torn between the two.
Speaking as an expat who is extremely close to their family, as much as one loves one's other half, it can be very very hard to go home and participate in family Christmases, celebrations, summers etc and have a wonderful time and then leave again ... . The better the visit, the harder it is to leave! Being home can also remind you of all the dreams you had of establishing a life there, but didn't fulfill. Even harder when visits involve illnesses and bereavement (although I know this sounds incredibly selfish). But it is hard getting back on the plane with your mind full of worry, wondering if you will see your parent alive again.
Added to that it also becomes rather disorientating living between two cultures and never feeling properly "at home". There came a point when I needed to establish my own life here and celebrate our own Christmases and Easters. I know some members of my family found that hard to deal with, although they have been great about it.
Added to the issues above, if your daughter doesn't work and her life has "shrunk" to an extent, she may have lost confidence, or income, or just finds it too emotionally painful. Or are people constantly asking her "when are you going to get a job/have a baby?" when she visits and she is struggling with those things?
So -op - I don't think you should put pressure on her - but maybe ask her gently why she hasn't visited in five years, and frame it in terms of feeling concerned about her and her welfare? If she is struggling with mh or anxiety or home-sickness, be prepared that she may not be able to articulate clearly why she finds it so hard to come home, it may be a self-protective mechanism, and something she needs help with. Ultimately if she is avoiding coming home, because it makes her feel too homesick to do so, in the nicest possible way, she needs to confront that in order to overcome it ifyswim.