In this period of forced quarantine (april 2020, province of Québec) I only have my phone to access Stack Exchange. On a phone, I'm much slower and it sometimes happen that I post an answer at the same time as someone else. See here for an example. I posted my answer at the same time as Qurultay. Our answer are roughtly the same. My answer isn't useful anymore and I want to delete it, but this seem impossible on the phone app.
My question: why can't I delete my own posts on the Stack Exchange app? If it matter, my phone runs on Android.
I don't know if it has already been ask before, or if it is the right place to ask.