I'm sure this has been answered many times, but could not find with the search.
When Last Pass doesn't add an Android App Username and Password, how do I add it manually and link it to the App so it will work automatically in the future.
To add a new password to the LastPass app for Android,
You may need to restart the app in question to see the option to use the LastPass autofill. Please also note that not all apps support LastPass' Autofill