Earlier quoted context omitted.
How do you mean that?
A compromised Apple developer account login pushing out a compromised Bitwarden mobile app to the Apple App Store that steals everyone's master passphrases.
This is not specific to Bitwarden though, it's the same for all apps. Now because Bitwarden is open source, you can actually compile and install it yourself (if you're confident that the sources you are compiling are the legitimate ones, and not a fork that will steal your passwords ;-)).
Same applies for e.g. Signal Messenger: since it's difficult to check what version of the code is coming from your store, you can always compile it from source and install it yourself.