I often used LastPass to Auto-Fill my identity credentials when signing up for new sites or filling forms. I know I can click the BW icon and access the identities, but there is no easy Auto-Fill functionality.
When you click the BW icon there is no Auto-Fill button option for each identity (like there is for logins), you have to click the identity and then scroll down to get to the Auto-Fill function.
The right click context menu also does not have the ability to Auto-Fill Identities.
And of course, if the field auto-fill overlay button is added, that should have identities as well.
To beat a dead horse, LastPass lists Logins first and then the Identities in all cases. Its super convenient.