Associate Identity with Logins

I’m wondering if there’s a way to associate Identities in Bitwarden with Logins. I’d like to be able to easily keep track of what online accounts of mine are associated with which Identity. Specifically, I want to know what phone number & address are associated with each of my accounts, where relevant. I’ve used custom fields to keep track of this, but it’s a lot of effort to fill in for each Login entry. It seems like being able to associate an Identity with a Login would be an easy way to do that, but I’m not seeing that option.

Any ideas on how to manage this better?

Is Identity just an autofill feature, or are there any other use cases?