There seems to be some movement with xCloud on iOS. According to sources at The Verge, Microsoft is looking at bringing the service to iPhones via a browser based solution. This could happen as soon as early 2021.
Recently Amazon announced their game streaming service named Luna. Amazon had found a way around Appel’s restrictive ecosystem by adding browser support for their streaming service. It now seems Microsoft is doing the same.
This could launch alongside a PC version, which has been in the works for some time. After a slow start for the project, it now seems it’s expanding quickly.