Android and iOS devices are recommended by Microsoft
Technology has evolved along with the needs and expectations of your customers and partners who have already adopted Android or iOS platforms and devices. Microsoft’s mission statement to empower every person and every organization on the planet to achieve more, compels us to support our Mobile apps on the supported Android and iOS devices.
Microsoft confirms that Windows 10 Mobile support for all devices will come to an end later this year, and has outlined what will happen next for those who do not move from their devices.
Microsoft is not focusing to build App Services for Android and iOS Devices Microsoft previously ended Windows Phone 8.1 support on July 11th 2017, so the end of Windows 10 Mobile support is not unexpected