On Android, contacts and Official Accounts can be added to a phone's home screen as a shortcut icon.
Add a friend to desktop: Enter WeChat > tap「Contacts」> select a friend > tap「...」in the right corner > tap「Add to Desktop」.
Add an Official Account to desktop: Enter WeChat > tap「Contacts」> Official Accounts > select an Official Account > tap the top right icon > tap「...」in the top right corner > tap「Settings」>「Add to Desktop」.