The desktop app can be used as a bridge for biometrics in the browser extension, but other than that, it basically serves no unique purpose unless and until they add autofill for desktop applications.
I also would like to know what the desktop app is used for?
I've seen apps like xpipe that have direct Bitwarden integration if you want (way too high risk for me but I can see some people using it), but even then it integrates directly to the servers API. When I need an ssh password or something I copy and paste it from the browser extension. I'm curious if I'm missing some functionality by not using the app.
Do you not have the browser open all the time? Not necessarily in the foreground, but at least in the background I always have a browser window. But tbh, most of the time it's in the foreground on the second monitor