It’s a Chrome OS running virtual machine with Debian Bookworm. GPU pass through is on and Linux games works just fine, but this notification opens up on every Steam start. I’ve set root and rafi user’s password in terminal and there it seems to work just fine. What is wrong with this prompt?

If by “can’t type it in” you mean that it doesn’t appear, then just type it anyway and press enter

Here’s resolution for anyone who might have same problem: I’ve installed Gnome terminal, that one allows to open another tab so I did it when prompt appeared and copied list of required packages as root (su command) in new tab. Packages installed, password was accepted. No more prompts.