Hi, welcome to the forum.
I don't think there are any deer-resistant daylilies. Deer like daylilies, especially the buds, and if they are hungry they will eat the foliage, too.
People do have different experiences with deer. Some find that nothing but a really tall fence will keep them away. Others find that applications of Milorganite, Liquid Fence, or Bobbex will deter them. Others don't have much of a problem with deer--I think this is sometimes the case when there is other abundant food available.
I myself apply Liquid Fence every couple of weeks during the season when daylilies are budding and blooming. I apply extra after it rains. Right now, in winter, I have to apply some, too. We don't have any snow cover here, and the grass is brown, so the deer have been here nibbling at the new daylily growth. I just noticed this the other day along with a pile of deer manure near one of my beds. That is a job for today.
