Adobe Express has no "Sign in with Apple" button on Android

I've recenetly begun using Acrobat Reader, and also needed a tool to create media quickly from my phone, so I gave Express a go... but I just can't. I mainly use my Apple ID for personal use, and it's the one I've been using to use Adobe web tools, so having the option to log in using that on Acrobat, Premiere Rush, and so on, but not on Express, seems weird to me. I was wondering if this was an Android port issue, or if the option just isn't there at all. I can make another account or stop using the dummy email generated by Apple to log in and try Express, but if any dev is reading, please put that button. You put a Google and Facebook button, how could you forget the Apple one?