Apple mail on Android
I can't access my apple mail on my galaxy s21 I have tried outlook and Gmail I generate the app specific password but it still gives me error messages either security and validation messages , any help appreciated.
One website I found has these suggestions to set up an iCloud email account on an Android phone, starting by using a computer. You may have tried some of this already but your question lacks this detail.
It's worth noting Apple's recommended email client settings as described in their support document Mail server settings for iCloud email clients