ultra wide is a dedicated camera sensor and as on8 don't have dedicated ultra wide camera sensors so its impossible to add this feature via software update
That is not the feauture which can be added to a smartphone via a update.That is only available to smartphones which have inbuilt wide angle camera lens.And on8 has 16mp primary lens with 5mp live focus(background blur) functionality.So wide angle feauture is not available for your device as it lacks wide angle camera lens.
