For now, don't expect new features for the Windows Phone version of Opera Mini
For the time being, those using Opera Mini on their Windows Phone device should not expect any updates to add new features or capabilities to the browser. This decision will be reviewed later this year. Opera did say that it will continue to make sure that the browser is secure and says that it still welcomes bug reports from users since it will continue to exterminate bugs if necessary.
Opera says that is doesn't have the resources required to build a universal Windows 10 app. It also adds that it doesn't have the time or resources to use Microsoft's bridge tools to port its iOS app to Windows 10 Mobile. Opera said that it did look into the possibility of using the bridge, but the complexities of a browser make it difficult to do.
You can still download the browser if you are a Windows Phone user by clicking on the sourcelink.
source: OperaMini (Windows|iOS|Android) via WindowsCentral