Yesterday Playing xCloud on Android, Today “Project xCloud is not currently available in...

There is no official announcement if xCloud will be available on iPhone but it is highly likely that it will the official statement is it will be available on "your phone, tablet or another
connected device" for more information on xCloud visit https://blogs.microsoft.com/blog/2018/10/08/project-xcloud-gaming-with-you-at-the-center/ and https://news.xbox.com/?s=xCloud

So Project Xcloud https://news.xbox.com/en-us/2019/03/12/project-xcloud-choice-for-how-and-when-you-play/

Hi XxDarkkAvenger,

the Project xCloud Prievew is already available for iOS! Please note, that only 10,000 people in total can try out the beta right now. For more infos visit https://majornelson.com/.

With kind regards

Microsoft already works on so called Project xcloud. You can play on any device xbox games. Watch the latest Xbox Inside VOD , there was a demo with FH4 on android mobile

Well, they introduced the Windows Phone a while ago, but they're no longer making those or releasing games on the platform. We currently have the Microsoft Solitaire Collection and Minecraft on iOS and Android for Xbox achievements. They're also working
on Gears Pop!, a tower defense Gears of Wars game for iOS (and Android too, I believe). And beyond that, Microsoft is working on

Project xCloud, which will allow gamers to play Xbox games anywhere on any Microsoft platform, which could potentially see a release on other platforms as well. So the answer to your question is yes.