In its Help section Brave has a togglable setting to show a warning pop-up when you press CTRL+Q, which is to prevent you from quitting Brave accidentally. If you do want to quit you have to hold the keyboard shortcut a bit longer.
In the Brave version from the Solus software center, this setting has been taken out. I cannot imagine why that was done, it does not make sense, but could you please put it back so the user can decide for themselves if they want to use it or not?