Most password managers have the ability to add multiple URL associations to autofill, e.g. my Google logins work for Google, Gmail and Android.com, or my Reddit logins, update to associate with reddit apps as I try them out.
Bitwarden has come up with Equivalent Domains. Currently, if I a user needs to use the search function for autofill, Bitwarden asks if they are sure that this is the right autofill for this site. It would be great if there were an option for the user to select yes, and add this URL to my equivalent domains. This way the next time I sign into my third party Reddit app, it recognizes that its Reddit, and the autofill works correctly.