Flur, I write novels, although they are peopled with teens and youngsters, the main plot focus is not YA.
That said, my YAs are for the most part Christians, and they face issues such as teen rebellion, sexual identity, fear of identity loss, social and political insecurity, and the of course the biggie, sex (will she, if he, etc).
None of these examples are exclusive to Christian YAs. But in my books they do play out against the background of God's love, and the expression of that Love through the Christian community in which these YAs live. Sometimes they are safe in that community, sometimes not.
I've seen a surge of Amish stories. Perhaps, these my be helpful?
I think the best thing I can do is read the genre to give me a better sense of what may and may not work.