Hey there,
currently Bitwarden only supports basic auth when there is only one matching credential present:
Basic Auth Prompts | Bitwarden Help Center (/help/basic-auth-autofill)
The current implementation doesn’t work for me, since i have many pages that are using basic auth and a regular login form.
In my opinion, the best solution would be to show a popup and let the user select the credentials that should be used - in the case that there are multiple matches.
Contrary to the post in the github issue #1124 it is possible and not related to a desktop app.