Should be out very soon according to https://stadt-bremerhaven.de/bitwarden-bekommt-native-apps/ (German)

Good news for Bitwarden users. They will get better mobile apps in the future. The current mobile app is built using a technology called Xamarin, a framework provided by Microsoft that allows developers to create a single app that works on both iOS and Android.
According to the Bitwarden developer, this does not feel native. It is also a bit sluggish and consumes too many resources. Likewise, Xamarin does not offer access to state-of-the-art functions.
Microsoft is also making drastic changes to the future of Xamarin and is developing it into a new product now called MAUI. Support for Xamarin also ends. According to the Bitwarden developers, the transition to MAUI was a below-average experience. Now you want to use Swift for iOS and Kotlin for Android. It is even close to completion.