What a shame for both of you , even though you've been totally honest I find it very sad. I adored my grandparents they acted as a buffer between me and my parents . My father was in the Forces so we travelled a great deal . However, my mother decided to stay behind one year as she didn't care for the posting. My brother and I , and Mum of course , lived with my Grandparents for a year. It was the happiest of my difficult childhood . I now have two granddaughters and I love them intensely . We have lovely times together I couldn't imagine seeing them once a year !
Hopefully your granddaughter has grandparents on her father's side who will give her the love and good times she needs.
NHS U turn on trans terminology