I have added a friend but she is nit showing up in my friend list even though shes online. I couldnt invite her into my world. No invite button

Please update ios version to like android version as soon as possible. I already add a friend and she is now showing up in my list but when I eneter xbox, I'm already friend with her. And set it to favourite.. then when I try to invite her, I couldnt see the invite button. She is playing using android latest version while I'm playing 1.16.10. Its kinda sucks because I purchase this app but couldnt play with her.