I have enabled Bitwarden’s 4-digit PIN protection on Android. When I launch or switch to Bitwarden, it prompts me to enter my PIN code and shows me four dashes. This is as desired.
What is not desired: I have to tap the dashes – twice – before my Android on-screen keyboard comes up to allow me to actually enter my PIN.
It would be better if the keyboard displayed automatically when needed. This is how the Authy app for Android behaves.