Devices that are running iOS 12 or later and have biometric authentication enabled for strong room can leverage the standard Password AutoFill mechanisms to surface the defined set of user login secrets directly from the device keyboard.
First you need to enable Password AutoFill from the device's settings app and select strong room as the password source.
Then you can touch the Passwords button on the device's keyboard when logging in to a website or app to present the list of strong room user logins.
And once you select the user login from the list to use you will be authenticated with Face ID or Touch ID and the userid and password values will be automatically populated.
The app's Settings area provides access to a Password AutoFill screen where you can see what secret's will be included in the AutoFill list and exclude one or more of them as/if required.