Question related to PSD and IOS art rage.

I have a psd currently on a wd my cloud, I moved this using a laptop and can see it is a psd.

I downloaded the psd using the app WD, the download is on a iOS device IPP.

Upon opening the file I choose art rage, the file opens and one layer is presented.

I go back to the down load in app iOS files and choose procreate and open. Now all layers are included.

Is it perhaps the method I chosen to open in IOS ? any advise on how to have all layers in art rage please ?
I will check, but the psd would have been opened as a PTG originally in desktop art rage and exported as a PSD.