I use an Android phone for most of my Medium reading and a great deal of my writing but because I can’t submit to a publication from a phone, I am forced to write one place and submit at another. Frustrating.
Also, I am one of several editors of a publication and can’t do my editor duties from my phone. Traveling last week on my editor day, I should have been able to review and publish submissions from my phone but I couldn’t, forcing me to ask someone else to cover that day for me.
I don’t use an Apple products but know other Medium contributors who do and they all have the problems you describe.