[Astrophotography on iOS App?]

I’ve been using Affinity Photo but have had some problems with stacking astrophotography.  I saw that now there is a dedicated “Astrophotography” function under the “file” menu in Mac OS 1.9.  Is this also true for iOS?  If so, how can I update my app?

[Official Affinity Photo V1 (Desktop) Tutorials]

I am using Affinity Photo on my iPad Pro.  I’ve looked at tutorials especially those regarding astrophotography of which I have a specific interest.  It seems the tutorials are all either on a Mac or PC, because the Home Screen is quite different from mine in iPadOS.  Just wondering if those versions (for Mac or PC) are so dramatically different from the one I am using.  Sorry if this is a rather basic question, I’m just getting started in trying to process deep space astrophotography and need to know if I am missing something basic.