Bitwarden

Their current app uses a cross platform framework that allowed them to write their app once and then publish to both iOS and Android. That system is no longer well supported and was causing them issues implementing passkeys on mobile. They've been working on rewriting the app individually for each platform using the platform's specific language. That's generally Java on Android and Swift on iOS. It's more work, but ideally the apps should be more responsive, better follow each platforms style guidelines, and have access to all features on the platform.