LibreELEC's implementation of Kodi 18.9 has a first boot wizard which nicely guides a new user through configuring the box but the WiFi passcode entry shows the passcode on the screen. Many people have large TVs in a room with public facing windows and this presents a security risk which extends beyond just the Kodi box, allowing someone to gain access to your WiFi network. In some countries (including the UK where I live) there are laws that require everyone to maintain a level of security that will prohibit unauthorised access to networks. A home owner is legally responsible for traffic originating from their network. This makes me feel very uncomfortable entering a passcode in the wizard.
Could the passcode entry use a password protection field, e.g. show * instead of the character, possibly briefly showing the entered character before changing to *.