Nintendo Online family members?

I bought this family membership on my Switch and wanted to add my friend's account as a family member. Although she is shown to me as a family member, she still has no access to online features and it is also shown that she has no online membership at all. Though I added her as a family member. Am I doing something wrong or is it just a mistake by Nintendo? Do I have to wait and see?

If she is shown as a family member, you should be too. If not, maybe wait another day or check or turn off the internet or sign in again. If all else fails, just write to Nintendo that there's a problem or ask experts from the Internet.